From the 400-student gift survey, what is the probability of not receiving a Mother’s Day gift?

From the 400-student gift survey, what is the probability of not receiving a Mother’s Day gift?

• A. 0.88
• B. 0.12
• C. 0.92
• D. 0.77

Answer: (A)

This question uses the idea of a complement in probability. If 12% of students receive a Mother’s Day gift, then the chance of not receiving one is the remaining portion: 1 − 0.12 = 0.88. In other words, 88% of students do not receive a gift. Checks with the numbers: 0.12 × 400 = 48 receive gifts, so 400 − 48 = 352 do not receive. The ratio 352/400 simplifies to 0.88, confirming the probability of not receiving a gift is 0.88.

This question uses the idea of a complement in probability. If 12% of students receive a Mother’s Day gift, then the chance of not receiving one is the remaining portion: 1 − 0.12 = 0.88. In other words, 88% of students do not receive a gift.

Checks with the numbers: 0.12 × 400 = 48 receive gifts, so 400 − 48 = 352 do not receive. The ratio 352/400 simplifies to 0.88, confirming the probability of not receiving a gift is 0.88.