In a pizza takeout restaurant, the following probability distribution was obtained for the number of toppings ordered on a large pizza. Find the mean and standard deviation for the random variable.

The random variable (number of toppings ordered on a large pizza) has a mean of 1.14 and a standard deviation of 1.04.

Step-by-step explanation:

The question is incomplete:

The probability distribution is:

x   P(x)

0   0.30

1    0.40

2   0.20

3   0.06

4   0.04

The mean can be calculated as:

(pi is the probability of each class, Xi is the number of topping in each class)

The standard deviation is calculated as:

16

step-by-step explanation:

2 x 40 = 80

80/5

= 16

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.