Answer:
Percentage of boys have school dinners: 60%
Percentage of pupils in this class have school dinners: 65%
Step-by-step explanation:
1. There are: 6+4 = 10 boys in the class -> corresponding to 100 %
1 boy is corresponding to 100% :10 = 10%
6 in 10 have school dinners -> 10% x 6 = 60%
2. There are 10( boys) + 7 (girls) + 3 (girls) = 20 pupils in the class -> corresponding to 100%
1 pupil is corresponding to 100% : 20 = 5%
There are : 6 + 7 = 13 pupils who have school dinners
13 in 20 have school dinners -> 5% x 13 = 65%
