magic bag - mr barton mathsmrbartonmaths.com/resourcesnew/something in common/magic...magic bag a...
TRANSCRIPT
Magic B
agA magic b
ag contains some black
and white
balls, all of th
e sam
e
size, w
eigh
t and sh
ape.
I put m
y hand
s in the bag and
sim
ultaneously and
random
ly pull out tw
o balls. T
hey are
both
the
same colour and
the magic b
ag tells m
e th
at the ch
ance of th
is occurring w
as exactly 0
.5.
The bag contains a give
n number
of black b
alls.
Can you w
ork out how many w
hite
one
s there are
?
What valid
combinations of b
lack and
white
balls are
possible?
= 45
= ?
SIC_10
Magic B
agA magic b
ag contains some black
and white
balls, all of th
e sam
e
size, w
eigh
t and sh
ape.
I put m
y hand
s in the bag and
sim
ultaneously and
random
ly pull out tw
o balls. T
hey are
both
the
same colour and
the magic b
ag tells m
e th
at the ch
ance of th
is occurring w
as exactly 0
.5.
The bag contains a give
n number
of black b
alls.
Can you w
ork out how many w
hite
one
s there are
?
What valid
combinations of b
lack and
white
balls are
possible?
= 66
= ?
SIC_10
Magic B
agA magic b
ag contains some black
and white
balls, all of th
e sam
e
size, w
eigh
t and sh
ape.
I put m
y hand
s in the bag and
sim
ultaneously and
random
ly pull out tw
o balls. T
hey are
both
the
same colour and
the magic b
ag tells m
e th
at the ch
ance of th
is occurring w
as exactly 0
.5.
The bag contains a give
n number
of black b
alls.
Can you w
ork out how many w
hite
one
s there are
?
What valid
combinations of b
lack and
white
balls are
possible?
= 91
= ?
SIC_10
Magic B
agA magic b
ag contains some black
and white
balls, all of th
e sam
e
size, w
eigh
t and sh
ape.
I put m
y hand
s in the bag and
sim
ultaneously and
random
ly pull out tw
o balls. T
hey are
both
the
same colour and
the magic b
ag tells m
e th
at the ch
ance of th
is occurring w
as exactly 0
.5.
The bag contains a give
n number
of black b
alls.
Can you w
ork out how many w
hite
one
s there are
?
What valid
combinations of b
lack and
white
balls are
possible?
= 120
= ?
SIC_10
Magic B
agA magic b
ag contains some black
and white
balls, all of th
e sam
e
size, w
eigh
t and sh
ape.
I put m
y hand
s in the bag and
sim
ultaneously and
random
ly pull out tw
o balls. T
hey are
both
the
same colour and
the magic b
ag tells m
e th
at the ch
ance of th
is occurring w
as exactly 0
.5.
The bag contains a give
n number
of black b
alls.
Can you w
ork out how many w
hite
one
s there are
?
What valid
combinations of b
lack and
white
balls are
possible?
= 153
= ?
SIC_10
Magic B
agA magic b
ag contains some black
and white
balls, all of th
e sam
e
size, w
eigh
t and sh
ape.
I put m
y hand
s in the bag and
sim
ultaneously and
random
ly pull out tw
o balls. T
hey are
both
the
same colour and
the magic b
ag tells m
e th
at the ch
ance of th
is occurring w
as exactly 0
.5.
The bag contains a give
n number
of black b
alls.
Can you w
ork out how many w
hite
one
s there are
?
What valid
combinations of b
lack and
white
balls are
possible?
= 190
= ?
SIC_10
Magic B
agA magic b
ag contains some black
and white
balls, all of th
e sam
e
size, w
eigh
t and sh
ape.
I put m
y hand
s in the bag and
sim
ultaneously and
random
ly pull out tw
o balls. T
hey are
both
the
same colour and
the magic b
ag tells m
e th
at the ch
ance of th
is occurring w
as exactly 0
.5.
The bag contains a give
n number
of black b
alls.
Can you w
ork out how many w
hite
one
s there are
?
What valid
combinations of b
lack and
white
balls are
possible?
= 231
= ?
SIC_10
Magic B
agA magic b
ag contains some black
and white
balls, all of th
e sam
e
size, w
eigh
t and sh
ape.
I put m
y hand
s in the bag and
sim
ultaneously and
random
ly pull out tw
o balls. T
hey are
both
the
same colour and
the magic b
ag tells m
e th
at the ch
ance of th
is occurring w
as exactly 0
.5.
The bag contains a give
n number
of black b
alls.
Can you w
ork out how many w
hite
one
s there are
?
What valid
combinations of b
lack and
white
balls are
possible?
= 276
= ?
SIC_10
Magic B
agA magic b
ag contains some black
and white
balls, all of th
e sam
e
size, w
eigh
t and sh
ape.
I put m
y hand
s in the bag and
sim
ultaneously and
random
ly pull out tw
o balls. T
hey are
both
the
same colour and
the magic b
ag tells m
e th
at the ch
ance of th
is occurring w
as exactly 0
.5.
The bag contains a give
n number
of black b
alls.
Can you w
ork out how many w
hite
one
s there are
?
What valid
combinations of b
lack and
white
balls are
possible?
= 325
= ?
SIC_10
Magic B
agA magic b
ag contains some black
and white
balls, all of th
e sam
e
size, w
eigh
t and sh
ape.
I put m
y hand
s in the bag and
sim
ultaneously and
random
ly pull out tw
o balls. T
hey are
both
the
same colour and
the magic b
ag tells m
e th
at the ch
ance of th
is occurring w
as exactly 0
.5.
The bag contains a give
n number
of black b
alls.
Can you w
ork out how many w
hite
one
s there are
?
What valid
combinations of b
lack and
white
balls are
possible?
= 378
= ?
SIC_10
Magic B
agA magic b
ag contains some black
and white
balls, all of th
e sam
e
size, w
eigh
t and sh
ape.
I put m
y hand
s in the bag and
sim
ultaneously and
random
ly pull out tw
o balls. T
hey are
both
the
same colour and
the magic b
ag tells m
e th
at the ch
ance of th
is occurring w
as exactly 0
.5.
The bag contains a give
n number
of black b
alls.
Can you w
ork out how many w
hite
one
s there are
?
What valid
combinations of b
lack and
white
balls are
possible?
= 435
= ?
SIC_10
Magic B
agA magic b
ag contains some black
and white
balls, all of th
e sam
e
size, w
eigh
t and sh
ape.
I put m
y hand
s in the bag and
sim
ultaneously and
random
ly pull out tw
o balls. T
hey are
both
the
same colour and
the magic b
ag tells m
e th
at the ch
ance of th
is occurring w
as exactly 0
.5.
The bag contains a give
n number
of black b
alls.
Can you w
ork out how many w
hite
one
s there are
?
What valid
combinations of b
lack and
white
balls are
possible?
= 496
= ?
SIC_10
Magic B
agA magic b
ag contains some black
and white
balls, all of th
e sam
e
size, w
eigh
t and sh
ape.
I put m
y hand
s in the bag and
sim
ultaneously and
random
ly pull out tw
o balls. T
hey are
both
the
same colour and
the magic b
ag tells m
e th
at the ch
ance of th
is occurring w
as exactly 0
.5.
The bag contains a give
n number
of black b
alls.
Can you w
ork out how many w
hite
one
s there are
?
What valid
combinations of b
lack and
white
balls are
possible?
= 561
= ?
SIC_10
Magic B
agA magic b
ag contains some black
and white
balls, all of th
e sam
e
size, w
eigh
t and sh
ape.
I put m
y hand
s in the bag and
sim
ultaneously and
random
ly pull out tw
o balls. T
hey are
both
the
same colour and
the magic b
ag tells m
e th
at the ch
ance of th
is occurring w
as exactly 0
.5.
The bag contains a give
n number
of black b
alls.
Can you w
ork out how many w
hite
one
s there are
?
What valid
combinations of b
lack and
white
balls are
possible?
= 630
= ?
SIC_10