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Anvisha [2.4K]
3 years ago
7

True or false: the common denominator of two fractions must be a factor of the denominator of both fractions ?

Mathematics
2 answers:
inn [45]3 years ago
5 0
Yes it’s true hope it helps pls thank me
Inga [223]3 years ago
4 0

The answer is true please give me brainlest

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How much will it cost for him to buy 3 dozen using the rate $12.00 for 20 cookies?
Art [367]
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20/12 = 1.666666666666667

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What is the reciprocal of 3 1/4
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Find the vertex of f(x) = 12 - 41 +3
timofeeve [1]

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3 years ago
A jar contains 3 red, 2 white, and 1 green marble. Aside from color, the marbles are indistinguishable. Two marbles are drawn at
IRISSAK [1]

Answer:

0.6

Step-by-step explanation:

A permutation is an arrangement of outcomes whereas a combination is a grouping of outcomes.

Order matters in case of permutations but does not matter in combinations.

Given:

Number of red marbles = 3

Number of white marbles = 2

Number of green marbles = 1

To find: probability of picking 4 marbles and getting one of each color

Solution:

Total number of outcomes = 6_C__4 = \frac{6!}{4!\,2!}=\frac{6\times 5\times 4!}{4!\times 2}=15

Number of favourable outcomes = 2 red, 1 white and 1 green marble + 1 red, 2 white and 1 green marble = 3_C_2\,2_C_1\,1_C_1+3_C_1\,2_C_2\,1_C_1 = \frac{3!}{2!\,1!}\times \frac{2!}{1!\,1!}\times 1+\frac{3!}{2!\,1!}\times 1\times 1=6+3=9

So, probability of picking 4 marbles and getting one of each color = Number of favourable outcomes/Total number of outcomes =\frac{9}{15}=\frac{3}{5}=0.6

4 0
3 years ago
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