Question
The average number of playing cards Peter and Justin had was 438. The average number of playing cards Peter and David had was 238. If the ratio of Justin's playing cards to David's playing cards was 7 : 2, find the number of playing cards Peter had.
4 m

Click button first when a symbol is required. X

The average number of playing cards Peter and Justin had was 438. The average number of playing cards Peter and David had was 238. If the ratio of Justin's playing cards to David's playing cards was 7 : 2, find the number of playing cards Peter had.