Given
The probability distribution for the random variable X is,
X - 6 7 8 9 10
P(X) - 0.31 0.23 0.11 0.26 0.09
To find the probability of the random variable X being at least seven.
Step-by-step explanation:
It is given that,
The probability distribution for the random variable X is,
X - 6 7 8 9 10
P(X) - 0.31 0.23 0.11 0.26 0.09
Then,

Hence, the probability of the random variable X being at least seven is 0.69.