The average number of questions Perry and Kylie solved was 209. The average number of questions Kylie and Shiyun solved was 193. The average number of questions Shiyun and Perry solved was 182. How many questions did each of them solve?
- Kylie
- Perry
- Shiyun
(a)
Number of questions that Perry and Kylie solved
= 209 x 2
= 418
Number of questions that Kylie and Shiyun solved
= 193 x 2
= 386
Number of questions that Shiyun and Perry solved
= 182 x 2
= 364
Number of questions that Kylie solved
= (418 + 386 - 364) ÷ 2
= 440 ÷ 2
= 220
(b)
Number of questions that Perry solved
= 418 - 220
= 198
(c)
Number of questions that Shiyun solved
= 386 - 220
= 166
Answer(s): (a) 220; (b) 198; (c) 166
