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brittanyjacob8
24.04.2020 •
Mathematics
There are 4 bottles of orange juice,
3 bottles of apple juice,
2 bottles of tomato juice.
Viv takes a bottle at random and drinks the juice.
Then Caroline takes a bottle at random and drinks the juice,
Work out the probability that they both take a bottle of the same type of juice.
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Ответ:
5/18
Step-by-step explanation:
alright what are the possibilities:
1*both take orange juice
2*both take apple
3*both take tomato
for the first option viv has 4/9 possibility of choosing orange since there are 4 orange juices out of a possible 9 then caroline comes and the new scenario is 8 bottles of which 3 are orange thus her probability of choosing orange too is 3/8. finally the combined probability of both taking orange would be 4/9 * 3/8 = 12/72
now we do the same thing for the second option of 2 apples and we get that the probability is 3/9*2/8 = 6/72
and for the third possibility it is 2/9*1/8= 2/72
now we sum the three answers above to get P=20/72 = 5/18
the reason we sum is that the event of same juice is equal to the 'sum' of the individual 3 events discussed above
so i hope this helps
Ответ:
answer is
In empty set, n(A) = { }.