A retirement plan for a company allows employees to invest in 10 different mutual funds. Six of the 10 funds grew by at least 10% over the last year. If Sam randomly selected 4 of the 10 funds, what is the probability that atleast 3 of Sam's 4 funds grew by at least 10% over the last year?
Please explain your answer.
No of ways sam can select 4 funds = 10C4
no of ways he can select all 4 of those funds which grew by 10% =6C4
no of ways he can sleect 4 funds out of 3 of those funds which grew by 10% = 6C3*4C1
so probablity is = (6C3*4C1+6C4)/10C4
henc E is the answer
My debrief: done-and-dusted-730-q49-v40