exam Maths Puzzle Numerical Ability

the school cafeteria surveyed the student body and discovered that 13/15 of the students listed pizza as their favorite lunch. There was a total of 78 students that liked pizza best. how many students were in the student body?

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exam Other Question

Anu chooses a diagonal from a regular 8 sided polygon. Anitha chooses another diagonal from the same polygon. What is the probability that they choose 2 diagonals of the same leng how many liters of a 30% solution must be added to 25 liters of 15% solution to make a solution that is 25% salt?