A New Car Dealer Observes That the Number X of Warranty

Short Answer

A new car dealer observes that the number X of warranty claims for repairs on each new car sold is Poisson distributed, with an average of six claims per car. Compute the probability that a new car sold by the dealer will have no more than three warranty claims.
Enter your answer in the form a $\mathrm { e } ^ { \mathrm { b } }$ .