There are only 23=823=8 possible ways to arrange the genders boy/girl, with repetition. Since the probability of boy and girl are equal, the probability of each of these arrangements are also equal. We can therefore count the number of possible "good" answers, and divide by 8.

There are 3 possible ways to have 1 boy, that being "first/second/third child is boy", so the probability of exactly 1 boy is indeed 3838.

Having at most 2 girls is the opposite of having three girls, so since there are only one way of having three girls, there must be 8−1=78−1=7 ways of having at most two girls, so the probability of at most two girls is indeed 78

8 0

3 years ago

Which of the following is a prime number between 40 and 50? A. 41 B. 45 C. 44 D. 49

Snowcat [4.5K]

Answer:

A.41

Step-by-step explanation:

7 0

3 years ago

Which solid has congruent horizontal and vertical cross sections?

Zinaida [17]

Answer:

triangular prism (pyramid) and cylinder.

Step-by-step explanation:

A pyramid is a polyhedron with one base that is a polygon and faces that are triangles.

A cylinder is a three-dimensional figure with congruent, parallel bases that are circles connected with a curved side.

3 0

3 years ago

How to write radical form in rational form

Law Incorporation [45]

Answer:
5⁵/⁴

Explanation:
Before we begin, remember the following:
 $\sqrt[n]{x}$ = x¹/ⁿ

 $\sqrt[n]{x^a}$ = xᵃ/ⁿ

The root form is known as the radical form while the power form is the rational form

Now, for the given:
We want to convert from the radical (root) form to the rational (power) form.
The given is:
4th root of 5⁵

Applying the above rules, we will find that the rational form is:
5⁵/⁴

Hope this helps :)

4 0

3 years ago

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