Question

Find the missing probability in the table below.

____
| X | 1 | 2 | 3 | 4 |
___________|


A. 0.85
B. 0.25
C. 0.15
D. 0.75

Answer 1

The answer would be B. or D. hope this helps :)

Answer 2

Option C, 0.15

Explanation:

From the given table probability for x = 1

`p_((1))` = 0.30

for x = 2

`p_((2))` = 0.40

for x = 3

`p_((3))` = 0.15

and for x = 4

`p_((4))` = x

As we know that the sum of probabilities of alll events will be 1.

so
`p_((1))` +
`p_((2))` +
`p_((3))` +
`p_((4))` = 1

0.30 + 0.40 + 0.15 + x = 1 ⇒ 0.85 + x = 1

x = 1 - 0.85 = 0.15

Option C, 0.15 is the answer.