Ruth, the Owner of a Mail-Order Business, Estimates That the Probability

Multiple Choice

Ruth, the owner of a mail-order business, estimates that the probability that a household receiving one of her catalogs will place an order with her is 0.3. How many catalogs must Ruth send out to ensure that the chance of obtaining at least one order is 55% or better? ​

A) 3
B) 5
C) 6
D) 4
E) 2