The probability a student in a school wears glasses is 3/7. There are 164 students who DON'T wear glasses. Find the number that wear glasses.

The probability they wear glasses is 3/7, which means the probability they don't is 1-3/7=4/7. This means 164 students make up 4/7 of the school. To find the number that wear glasses we need to find how many students in 3/7 of the school. First find 1/7, which is 164 divided by 4 (as 1/7 is 4/7 divided by 4), which is 41. Then the total number that wear glasses (3/7) is 41x3=123

Answered by Alice R. Maths tutor

5493 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Make y the subject of the formula x=(2y-1)/(4-y)


Write 8^2(4^2 / 2^7) in the form 2^x


A 20-foot ladder is leaning against a vertical wall. The bottom of the ladder is pulled away horizontally from the wall at 3 feet per second. How fast is the top of the ladder sliding down the wall when the bottom of the ladder is 10 feet away?


Rearrange the formula to make 'y' the subject: x = (1 - 2y)/(3 +4y)


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences