The universal set is a group of 60 pupils. Set A contains those who cycle to school and set B those

Question

The universal set is a group of 60 pupils. Set A contains those who cycle to school and set B those who walk to school on at least one day of the week. There are 18 in A only, 25 in B only, and 9 in neither. Find the number in both sets.[2] Find $n(A)$ and $n(B)$.[2] Find the number who use exactly one of these two methods.[1]

Accepted Answer

(a) $8$ (b) $26$ and $33$ (c) $43$

Recovering set totals from region data

Recovering set totals from region data

Solution:

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