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Vesnalui [34]
3 years ago
5

Can you please solve this problem?

Mathematics
1 answer:
shtirl [24]3 years ago
6 0

Turn the fractions into decimals by dividing the top number by the bottom number, then multiply that by 100 to make it a percentage:


34/40 = 0.85 x 100 = 85%

20/25 = 0.80 x 100 = 80%

53/60 = 0.883 x 100 = 88.3%


The Last one is the highest percentage, so 53/60 is the best score.

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Step-by-step explanation:

These probability can be describe with a Binomial Distribution. These distribution can be used when we have n identical and independent situations in which there is a probability p or probability of success and a probability q or probability of fail. Additionally q is equal to 1 - p. The probability of x for a situation in which we can apply binomial distribution is:

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Where x is the variable that says the number of success in the n situations

And nCx is calculate as:

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From the question we can identify that:

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Then the probability of get zero questions correct of 4 questions is:

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The probability of get three questions correct of 4 questions is:

P( 3, 4, 0.2) = 4 C3 * p^{3 } * q^ {4-3}= 0.0256

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