According to me the probability is 1/4, because there are 4 possible outcomes when two coins are flipped - TT, TH, HT, HH.

<span>Also, would it matter if the coins are flipped one after other rather than together</span>

5 0

3 years ago

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Assume that adults have IQ scores that are normally distributed with a mean of mu equals 105 and a standard deviation sigma equa

kondor19780726 [428]

Answer: 0.6827

Step-by-step explanation:

Given : Mean IQ score : $\mu=105$

Standard deviation : $\sigma=15$

We assume that adults have IQ scores that are normally distributed .

Let x be the random variable that represents the IQ score of adults .

z-score : $z=\dfrac{x-\mu}{\sigma}$

For x= 90

$z=\dfrac{90-105}{15}\approx-1$

For x= 120

$z=\dfrac{120-105}{15}\approx1$

By using the standard normal distribution table , we have

The p-value : $P(90$

$P(z$

Hence, the probability that a randomly selected adult has an IQ between 90 and 120 =0.6827

5 0

3 years ago

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PLEASE HELP! IN DESPERATE NEED! Please SHOW YOUR WORK! Thx so much! :)

choli [55]

The 1st one
y=37
x=18.5

7 0

3 years ago

Which of these vectors can be written as a linear combination of vector[-6,-4,7,1] and [-4,-3,2,-1]?

borishaifa [10]

Answer:

Step-by-step explanation:

options?

4 0

3 years ago