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Q17: Paper 1 – November 2022
Q17: Paper 1 – November 2022
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Question
17)
There are only blue counters, green counters, red counters and yellow counters in a bag.
The table shows the number of blue counters in the bag.
There are only blue counters, green counters, red counters and yellow counters in a bag.
The table shows the number of blue counters in the bag.
There is a total of 100 counters in the bag.
Ashin takes at random a counter from the bag.
(a) Find the probability that the counter is not blue.
Ashin takes at random a counter from the bag.
(a) Find the probability that the counter is not blue.
[2 marks]
The ratio of the number of blue counters to the number of green counters is 2 : 3
(b) Work out the number of green counters in the bag
[2 marks]
Bradley says,
“The number of red counters in the bag is the same as the number of yellow counters in the bag.”
(c) Can Bradley be correct?
Give a reason for your answer.
[1 mark]
Mark Scheme
Working
Working
There are only blue counters, green counters, red counters and yellow counters in a bag.
The table shows the number of blue counters in the bag.
There are only blue counters, green counters, red counters and yellow counters in a bag.
The table shows the number of blue counters in the bag.
There is a total of 100 counters in the bag.
Ashin takes at random a counter from the bag.
(a) Find the probability that the counter is not blue.
Ashin takes at random a counter from the bag.
(a) Find the probability that the counter is not blue.
The ratio of the number of blue counters to the number of green counters is 2 : 3
(b) Work out the number of green counters in the bag
There is no working for part c - see mark scheme