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Lemur [1.5K]
3 years ago
13

There are 12 marbles in a bag, and the marbles are either yellow or green. Two marbles will be randomly picked from the bag, wit

hout replacing the first one picked. The probability that both marbles will be yellow is 5/33 . How many YELLOW marbles are in the bag? A) 4 B) 5 C) 6 D) 7
Mathematics
2 answers:
olga2289 [7]3 years ago
7 0

Answer:

B) 5

Step-by-step explanation:

The probability of picking yellow first is x/12. The probability of picking yellow second is x-1/11. This will give a solution of x(x-1)/132*5/33 is equivalent to 20/132. 5 and 4 are the only two consecutive numbers that when multiplied together equal 20. Therefore there are 5 yellow marbles in the bag.

ale4655 [162]3 years ago
6 0

Answer:

d

Step-by-step explanation:


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The length of human pregnancies from conception to birth varies according to a distribution that is approximately Normal with me
inn [45]

Answer:

Kindly check explanation

Step-by-step explanation:

Given that :

Mean (m) = 266 days

Standard deviation (s) = 16 days

A.) p(( Z ≤ (x - m) /s) = 2.5%

p(( Z ≤ (x - 266) /16) = 0.025

(x - 266) /16 = - 1.96 (Z probability calculator)

x - 266 = - 31.36

x = - 31.36 + 266

x = 234.64

B.)

p(( Z ≤ (x - m) /s) = 2.5%

p(( Z ≤ (x - 266) /16) = 0.025

(x - 266) /16 = - 1.96 (Z probability calculator)

x - 266 = - 31.36

x = - 31.36 + 266

x = 234.64

p(( Z ≤ (x - m) /s) = 2.5%

p(( Z ≤ (x - 266) /16) = 0.025

(x - 266) /16 = 1.96 (Z probability calculator)

x - 266 = 31.36

x = 31.36 + 266

x = 297.36

Hence,

234.64 < x <297.36

C.)

p(( Z ≤ (x - m) /s) = 2.5%

p(( Z ≤ (x - 266) /16) = 0.025

(x - 266) /16 = 1.96 (Z probability calculator)

x - 266 = 31.36

x = 31.36 + 266

x = 297.36

4 0
3 years ago
Find the area of trapezoid JKLM. Round the answer to the nearest tenth.
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from the diagram, we can see that the height or line perpendicular to the parallel sides is 8.5.

likewise we can see that the parallel sides or "bases" are 24.3 and 9.7, so

\textit{area of a trapezoid}\\\\ A=\cfrac{h(a+b)}{2}~~ \begin{cases} h=height\\ a,b=\stackrel{parallel~sides}{bases}\\[-0.5em] \hrulefill\\ h=8.5\\ a=24.3\\ b=9.7 \end{cases}\implies \begin{array}{llll} A=\cfrac{8.5(24.3+9.7)}{2}\\\\ A=\cfrac{8.5(34)}{2}\implies A=144.5~in^2 \end{array}

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What 2 numbers are factors of 18?
WITCHER [35]

Factors are the numbers you multiply together to get given number.

All possible factorizations of number 18 by two factors are:

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4 0
3 years ago
Read 2 more answers
What are the least common multiple of 12,24,16?
vekshin1

Least Common Multiple is :

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Calculate Least Common Multiple for :

   12, 16 and 24

Factorize of the above numbers :

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LCM = 24 • 3

Least Common Multiple is :

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Please mark brainliest again because someone deleted my answer


8 0
3 years ago
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