exam
Maths Puzzle
Numerical Ability
A circular swimming pool is surrounded by a walkway 2m wide. Find the radius of the pool if the area of the walkway is 88m square?
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exam Other Question
Find the number of combinations
C
6 4
The questions is:
There are 700 students that watch TV. 45% are men. If the confidence interval is 95% what is the true proportion of men that watch tv.
What is the correct formula?