Lilyana runs a cake decorating business, for which 10. of i0\% her orders come over the telephone. Let c be the no- of cake orders

Lilyana runs a cake decorating business, for which 10. of i0\% her orders come over the telephone. Let c be the no- of cake orders Lily receives in a month untill she 1st gets order over phone. Assume the method of placing each cake order is independent. Find the probability that it takes fewer than 5 orders to get her 1st phone order of the month. for Lily