3 years ago

The other answer choice is 30

Mathematics

1 answer:

il63 [147K]3 years ago

8 0

Answer:

21 pencils

Step-by-step explanation:

b 21 pencils

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Perimeter and area of a rectangular figure has a perimeter of 34cm its length is 9cm

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32 = 2(L+B)

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Answer:

Probability to solve 7 problem will be equal to $\frac{1}{15}$

Step-by-step explanation:

It is given total number of question = 10

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We have to find the probability that she can solve 7 question

Probability will be equal to ratio of favorable outcome to total sample space

Favorable outcome will be equal to $^8c_7$

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So probability will be equal to $P=\frac{^8C_7}{^{10}C_7}=\frac{6}{90}=\frac{1}{15}$

So probability to solve 7 problem will be equal to $\frac{1}{15}$

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