Bernoulli Trials Homework Problem

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Janji
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bernoulli trials homework problem
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this is the answer
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Is this right?
 
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mjc123 said:
Your answers are not answers. Numerical answers are required. You can't give answers in terms of x and y, which are variables.
can you help explain more?
 
Sometimes problems want you work it all the way to a numerical answer, a single simple value for the teacher to check. Your answer reduces it to an expression where you could’ve done the arithmetic evaluation to get a numerical answer but stopped short of that goal.

it looks like you are free to select x and y at the start.
 
jedishrfu said:
Sometimes problems want you work it all the way to a numerical answer, a single simple value for the teacher to check. Your answer reduces it to an expression where you could’ve done the arithmetic evaluation to get a numerical answer but stopped short of that goal.
Could you hint me how to get the numerical answer?