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

Option  C, 0.15

Step-by-step explanation:

From the given table probability for x = 1

= 0.30

for x = 2

= 0.40

for x = 3

= 0.15

and for x = 4

= x

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

so  + + + = 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.

1/800 is the right answer