A Sailing School Offers Sailing Lessons on Sundays for Adults

Multiple Choice

A sailing school offers sailing lessons on Sundays for adults.It has 20 life jackets available in the small size and 25 in the large size.It has found that 55% of adults need the large size and the remainder the small size.If 40 adults show up for lessons one Sunday morning,what is the probability that the school will run out of the small life jackets and that someone needing the small size will have to wear a large life jacket?

A) 0.102
B) 0.626
C) 0.382
D) 0.171
E) 0.829