Table below shows probability distribution of siblings of students in a high school of 1500. what is expected value for the number of siblings of a randomly chosen student?
#of siblings- 0 1 2 3 4 5
probability- 0.20 0.65 0.08 0.04 0.02 0.01
a, 1.26 b, 2.5 c. 1.06 d.1.2

Option C

Step-by-step explanation:

Let X be a discrete random variable that counts the number of siblings a randomly selected student has. Then the expected value of X is defined as:

Where is the probability that a randomly selected student has siblings

With

So in this case we know that

#of siblings 0        1        2        3        4         5

probability 0.20 0.65 0.08  0.04  0.02  0.01

Therefore:

The answer is the option C.

0.85 or 85%

step-by-step explanation:

1) divide 23 by 27

2) round the decimal to the nearest 10

3) so your answer would be 0.85 or 85%

then say something, tell them they won’t respect you if you don’t even have respect for your self sweetheart you need to lay it on them, all of it : )