In Mrs.Ramons class, the ratio of boys and girls is 2 to 3. The class has 30 students. How many girls are in Mrs.Ramons class?

Mathematics

1 answer:

Kay [80]3 years ago

4 0

Answer:

18 girls

Step-by-step explanation:

2 / [2+3] x 30 =

2/5 x 30 =60/5 =12 are girls.

30 - 12 =18 are boys, so that:

18:12 =3:2

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Ben, Bob and Bill are triplets. They were born 5 years before their sister, Stephanie. This year the product of their four ages

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Let the triplets' age be x, the sister's age is then x-5.
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$P(X=k) = \binom{50}{k} p^{k}(1-p)^{50-k}$ for $0\leq k \leq 50$ , with p=0.62