It takes one examiner 15 hours to mark 80 exam papers. How long should it take 5 examiners to mark 80 exam papers

It will take 3 hours for 5 examiners to mark 80 papers.

Step-by-step explanation:

Given:

Time taken by an examiner to mark 80 exam papers = 15 hours

To find time taken by 5 examiners to mark 80 exam papers.

Solution:

Applying unitary method.

One examiner takes 15 hours to mark 80 exam papers

So, in one hour he can mark =  papers

In hour 5 examiners can mark = papers

So, we know 5 examiners can mark   papers in 1 hours.

So, to mark 1 paper they will take = = of a paper

Thus, to mark 80 papers they will take = hours.

Thus, it will take 3 hours for 5 examiners to mark 80 papers.

answer: 94

step-by-step explanation: 79+91+92+94+94 = 450 divided by 5 (since there are 5 number that are being added) = 90

there are 25 people coming to the party

step-by-step explanation:

the text says that there will be 22 children at this party, 1 teacher, and 2 parents. so if you add them all together (22+1+2) it will equal 25. (=25)