Question

A total of 220 students are in a lecture hall.
2/5 of girls and 1/2of boys wear spectacles. The number of girls who go not wear spectacles is equal to the number of boys who wear spectacles.
How many boys are there in lecture hall?

Answer 1

Answer:

120

Step-by-step explanation:

3/5 girls don't wear spectacles

1/2 boys don't wear spectacles  

3/5 girls= 1/2 boys

120/2=60   that means there are 100 girls so,

100/5=20 that equals 1/5 so,

multiply by 3(20 x 3= 60)

60=60 done!

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