Seudónimo Seudónimo
  • 01-11-2016
  • Mathematics
contestada

In a class of 72 pupils, the ratio of passes to failures in the final exam was 8:1. How many pupils passed the exam?

P.S please show working out.

Respuesta :

TooNashty
TooNashty TooNashty
  • 01-11-2016
72 total pupils
8x passed the test, x did not 
8x + x = 72
9x = 72
x = 8

So since 8x passed the test, substitute 8 for x
8(8) = 64

64 pupils passed the exam
Answer Link

Otras preguntas

what were the advantages of living in a medieval city?
Desert rabbitds are adapted to the warm climate because their large ears aid in the removal of haet by
Answer, se estima que en el año 2034 uno de cada tres _____ va a ser de origen hispano.
Mecca lay on a trade route on the edge of the desert that takes up most of what?
When a hard-copy document needs to be added to the ehr, the healthcare professional uses a ________________ to capture the document and add it to the electronic
Which is the best description of obesity
The cost of two mopeds is the same as the cost of seven bicycles. The cost of one bicycle is $152. Therefore, the cost of one moped is
A gauge of how exact a measurement is called
Which of these best describes a desert climate
why is democracy the political system in America?