Q-1) Of the 84 parents who attended a meeting at a
school, 25 volunteered to supervise children during
the school picnic and 11 volunteered both to supervise
children during the picnic and to bring refreshments to
the picnic. If the number of parents who volunteered
to bring refreshments was 1.5 times the number of
parents who neither volunteered to supervise children
during the picnic nor volunteered to bring
refreshments, how many of the parents volunteered to
bring refreshments?
Choose the correct option.
A) 25
B) 36
C) 38
D) 45
E) 42
i used the following formula: total = group1 + group2 + neither - both   using the information from the question stem, we have:   84 total people   25 who supervise (group1)   x who neither supervise nor bring refreshments   1.5x people who bring refreshments (group2)   11 who supervise AND bring refreshments (both)   therefore...   84 = 25 + 1.5x + x - 11   solving, we get x = 28   since we want the value of those who bring refreshments AND supervise:   1.5(28) = 42   answer is 42
<result>E</result>
Q-1) Of the 84 parents who attended a meeting at a
school, 25 volunteered to supervise children during
the school picnic and 11 volunteered both to supervise
children during the picnic and to bring refreshments to
the picnic. If the number of parents who volunteered
to bring refreshments was 1.5 times the number of
parents who neither volunteered to supervise children
during the picnic nor volunteered to bring
refreshments, how many of the parents volunteered to
bring refreshments?