Let X denotes the number of hours a person uses a mobile and the probability distribution of X is as
| X | 0 | 1 | 2 | 3 | 4 |
| P(X) | 0.1 | K | 2K | 2K | K |
Then the value of K is
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 0.15
In a probability distribution, the probabilities of all the values of X add up to 1:
\(0.1 + K + 2K + 2K + K = 1\)
\(0.1 + 6K = 1\)
\(6K = 0.9\)
\(K = 0.15\)