exam Maths Puzzle Numerical Ability

Please help with the following problem:

A college admissions director wishes to estimate the mean age of all students currently enrolled. In a random sample of 20 students, the

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exam Other Question

31. A club consists of 25 married couples. Determine ways a committee
of 7 people can be formed from these couples a)if there are exactly 5
men on the committee,b) and if Several values of the two functions f and g are listed in the following tables
x 4 5 6 7
f(x) 7 6 5 4

x 4 5 6 7
g(x) 6 7 4 5

find (f*g) (6