Which of the following is a perfect square? A. 400 B. 210 C. 37 D. 199

Mathematics

2 answers:

goldenfox [79]3 years ago

5 0

Answer:

400

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..............

Marrrta [24]3 years ago

5 0

It’s A 400

Because if you divide 400 divided 4 you will get 100. The square sides are all equal, so each side has to be 100.

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Step-by-step explanation:

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Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinatios of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

In this problem, we have that:

12% of children are nearsighted. This means that $p = 0.12$ .

A school district tests all incoming kindergarteners' vision. In a class of 18 kindergarten students, what is the probability that 0 or 1 of them is nearsighted?

There are 18 students, so $n = 18$