exam Maths Puzzle Numerical Ability

Can you please help me with this. I do not understand how to do this.

Suppose that x has a distibution with u = 72 and o = 8.
if random samples of size n = 16 are selected, ca

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Please help!! I have tried this problem to no end. It is a tqake home homework, not out of a text book. Thanks, Laura

solve the given equation: (e^3)x^*e^x^2=e^10 An audio store buys 60 cassettes. It gives away 3 cassettes free for a contest. It sells the remaining cassettes for 2 time the purchase price. The profit on the cassettes is $