A certain normal distribution has a mean = 30 and a standard deviation = 4. Find the probability that a randomly selected data value is between 22 and 34.
O 68.396
O 81.8696
O 97.796
O Not defined

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11

15: 24

62.5%

step-by-step explanation: