A box contains 40 oranges,12 of which are unripe.i pick one at random.what is the probability that it is (a)ripe, (b)unripe?

Answer 1

s=(40 orange) pr=no of required outcome=40 ripe oranges=28 unripe oranges=12 pr(ripe)=28/40 =7/10 pr(unripe)=12/40=3/10

Answer 2

of the 40 oranges, 12 are unripe ----> 28 are ripe

prob(ripe) = 28/40 = 7/10
so
prob(unripe) = 1 - 7/10 = 3/10

you are correct

Answer 3

yes

Answer 4

What is the probability that a student chosen at random from the class (Age 16,No 7),( Age 7,No 22), (Age 18, No 13) that is not 17 years