Determine the probability of fewer than or equal to 9 successes for a random variable with a

Question:

Determine the probability of fewer than or equal to 9 successes for a random variable with a Poisson with parameter λ = 8.0.
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...