4 years ago

Jo picked a number and added 3 to it. The answer was 11 What was the number?

Mathematics

2 answers:

Luden [163]4 years ago

5 0

Answer: 8

Step-by-step explanation:

Since we know that the answer was 11 and Jo added 3 to it we can simply subtract 3 from 11 to get our answer.

11-3=8

Therefore, our answer would be 8.

DaniilM [7]4 years ago

3 0

Answer:

Step-by-step explanation:

n + 3 = 11

n = 8

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Molodets [167]

For 1 the answer is Junior High B which is letter C

3 0

4 years ago

A binomial probability experiment is conducted with the given parameters. Compute the probability of x successes in the n indepe

-Dominant- [34]

Answer: 0.0031

Step-by-step explanation:

Binomial distribution formula :-

$P(x)=^nC_xp^x(1-p)^{n-x}$ , where P(x) is the probability of x successes in the n independent trials of the experiment and p is the probability of success.

Given : A binomial probability experiment is conducted with the given parameters.

$n=9,\ p=0.8,\ x\leq3$

Now, $P(x\leq3)=P(3)+P(2)+P(1)+P(0)$

$=^9C_3(0.8)^3(1-0.8)^{9-3}+^9C_2(0.8)^2(1-0.8)^{9-2}+^9C_1(0.8)^1(1-0.8)^{9-1}+^9C_0(0.8)^0(1-0.8)^9\\\\=\dfrac{9!}{3!6!}(0.8)^3(0.2)^6+\dfrac{9!}{2!7!}(0.8)^2(0.2)^7+\dfrac{9!}{1!8!}(0.8)(0.2)^8+\dfrac{9!}{0!9!}(0.2)^9=0.003066368\approx0.0031$