Question 1019818
p(phone 1 will ring) = .35
p(phone 2 will ring) = .06
p(phone 3 will ring) = .1


p(phone 1 will not ring) = 1 - .35 = .65
p(phone 2 will not ring) = 1 - .06 = .94
p(phone 3 will not ring) = 1 - .1 = .9


p(all 3 phones will not ring) = .65 * .94 * .9 = .5499