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Answer:
<u>Step-by-step explanation:</u>
There are 130 students.
There are 58 boys --> 72 girls
A) 49 chose football: 27 are girls --> 22 are boys
B) 72 girls: 24 chose running, 27 chose football --> 21 girls chose tennis
C) 27 students chose tennis: 21 are girls --> 6 are boys.
D) 58 boys: 22 chose football, 6 chose tennis --> 30 boys chose running.
Total running = 30 boys + 24 girls = 54
Total students = 130
Answer:
The probability distribution of X is given by,
P(X = x) 0.17 when x = 1
0.22 when x = 2
0.28 when x = 3
0.33 when x = 4
= 0 otherwise
Step-by-step explanation:
According to the question, X is the random variable denoting age of a house to the nearest year in a neighborhood.
From the given data we can construct the following table -
Age of house(X) Frequency Relative frequency
(Almost equal to)
1 15 0.17
2 20 0.22
3 25 0.28
4 30 0.33
So, the probability distribution of X is given by,
P(X = x) 0.17 when x = 1
0.22 when x = 2
0.28 when x = 3
0.33 when x = 4
= 0 otherwise