Out of 180 candidates who seated for an examination, there were 100 boys. If 64% of boys and 70% of the girls passed, what percentage of the total failed?

Question

Out of 180 candidates who seated  for an examination, there were 100 boys. If 64% of boys and 70% of the girls passed, what percentage of the total failed?

anonymous · Answer

let's start by finding the total number of student who failed. 64% of boys passed, this means that 36% failed. 36% of 100 boys is 36.
There were 80 girls (180-100) taking that test, and 30% failed it (100%-70%). 30% of 80 is 24
In total, 60 students failed the test out of 180, so that means there's a 33,33...% failure rate on it (60/180 *100%)