b+g = 53
5/7 g + 3/5 b = 35
5/7 (53-b) + 3/5 b = 35
b = 25
check:
g = 53-25 = 28
5/7 * 28 + 3/5 * 25 = 20 + 15 = 35
right on.
The mathematics club in a school has 53 members 5/7 of the girl members and 3/5 of the boys members are from lower secondary. The total numbers of lower secondary members is 35. How many members of the club are boys?
1 answer