1) the graph shows a probability distribution.

what is p(x< 5)?

a) 0.3

b) 0.375

c) 0.625

d) 0.7

2) the graph shows a probability distribution.

which probabilities are equal to 0.2?

select each correct answer.

1) p(x≤2)

2) p(x≥4)

3) p(2≤x≤4)

4) p(1≤x≤3)

1. is the area under the curve to the left of , which is a trapezoid with "bases" of length 2 and 5 and "height" 0.2, so

2. Find the area under the curve for each of the specified intervals:

(triangle with base 2 and height 0.2)

(triangle with base 1 and height 0.4)

(trapezoid with "bases" 0.2 and 0.4 and "height" 2)

(trapezoid with "bases" 0.1 and 0.3 and "height" 2)

72 is the answer to this problem