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Grade D Probability. The two-way table shows the gender and eye colour of 28 children. (a) A child is chosen at random from the class. Find the probability that the child (i) is a boy (1 mark)

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grade d probability
Grade D Probability

The two-way table shows the gender and eye colour of 28 children.

(a) A child is chosen at random from the class. Find the probability that the child

(i) is a boy (1 mark)

(ii) has green eyes (1 mark)

(iii) is a boy or has green eyes (1 mark)

(b) John writes the following in his Maths book.

Explain what is wrong with John’s work.(1 mark)

grade d probability answers
Grade D Probability - answers

The two-way table shows the gender and eye colour of 28 children.

(a) A child is chosen at random from the class. Find the probability that the child

(i) is a boy 13/28(1 mark)

(ii) has green eyes 7/28 = ¼(1 mark)

(iii) is a boy or has green eyes 16/28 = 4/7 (1 mark)

(b) John writes the following in his Maths book.

Explain what is wrong with John’s work.(1 mark)