Question 1145776
"Fewer than 4 tornadoes" is another way of saying 3,2,1, or 0 tornadoes.
<pr>
Probability of exactly 3 tornadoes: {{{(0.12)^3*(0.88)^14*(17!/(3!*14!))}}} = 0.1963
Probability of exactly 2 tornadoes: {{{(0.12)^2*(0.88)^15*(17!/(2!*15!))}}} = 0.2878
Probability of exactly 1 tornado: {{{(0.12)^1*(0.88)^16*(17!/(1!*16!))}}} = 0.2638
Probability of exactly 0 tornadoes: {{{(0.88)^17}}} = 0.1138
<pr>
Probability of "fewer than 4 tornadoes": 0.1963 + 0.2878 + 0.2638 + 0.1138 = 0.8617