A box contains 40 good and 10 defective fuses If 10 fuses ar

A box contains 40 good and 10 defective fuses. If 10 fuses are selected, what is the probability they will all be good?

I\'m more interested in how you get the answer rather than the answer itself. Please post your work if possible. Thank you

Solution

There are 50C10 ways to choose any 10 fuses.

There are 40C10 ways to choose 10 all good fuses.

Thus,

P(All good) = (40C10)/(50C10) = 0.082519234 [answer]