2 years ago

Find the common ratio of the sequence. 2, -10, 50, -250, ...

Mathematics

2 answers:

storchak [24]2 years ago

6 0

Answer:

-5

Step-by-step explanation:

ludmilkaskok [199]2 years ago

5 0

The common ratio is -5, note that each value is the previous value multiplied by -5.

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Answer:

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2 years ago

Find the difference. 7 7/8 - 3 1/4 ?

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3 years ago

Read 2 more answers

In a statistics class of 13 sophomores, 12 juniors, and 8 seniors, 5 of whom are male sophomores, 6 of whom are female juniors,

8_murik_8 [283]

Answer:

$\frac{20}{33}$

Step-by-step explanation:

We are given that

Sophomores=13

Juniors=12

Seniors=8

Male sophomores=5

Female sophomores=6

Male seniors=4

We have to find the probability of randomly selecting a junior or a senior.

Total persons=13+12+8=33

Let A=Seniors

B=Juniors

Probability,P(E)= $\frac{number\;of\;favorable\;cases}{total\;number\;of cases}$

Using the formula of probability

$P(A)=\frac{8}{33}$

$P(B)=\frac{12}{33}$

$A\cap B=0$

$P(A\cap B)=0$

$P(A\cup B)=P(A)+P(B)-P(A\cap B)$

$P(A\cup B)=\frac{8}{33}+\frac{12}{33}$

$P(A\cup B)=\frac{8+12}{33}=\frac{20}{33}$

Hence, the probability of selecting a junior or senior= $\frac{20}{33}$

3 0

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F is the right answer

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