Question

URGENT!!!
Can you please solve this example in 50 minutes.

2 types of mineral fertilizers: A and B, are used on the plantation. There are 8 different packages of fertilizer A and 4 different packages of fertilizer B in the storage. It is needed 4 packages of fertilizers for the spring mineralization of the soil and the owner randomly chooses 4 packages.

a) How many different ways are there to choose 4 fertilizer packages?

b) Find the probability that all four B fertilizers are were chosen. (Round the result to 4 decimals.)

c) Find the probability that at least one A fertilizer is chosen. (Round the result to 4 decimals.)

Answer 1