Question
The average number of buttons Peter and Henry had was 121. The average number of buttons Peter and Ian was 68.5. Given that the ratio of the number of buttons Henry had to the number of buttons Ian had was 9 : 2, find the number of buttons Peter had.
4 m

Click button first when a symbol is required. X

The average number of buttons Peter and Henry had was 121. The average number of buttons Peter and Ian was 68.5. Given that the ratio of the number of buttons Henry had to the number of buttons Ian had was 9 : 2, find the number of buttons Peter had.