To calculate the probability that the selected person will not be a male given that they are over 30 years old, we need to consider only the number of females over the age of 30 and the total number of people over the age of 30.
The number of females over the age of 30 is 6, and the total number of people over the age of 30 is 9 males + 6 females = 15.
Therefore, the probability that the selected person will not be a male given that they are over 30 years old is 6/15, which simplifies to 2/5 or 0.4.
In a group of people on holiday it is established that there are:
12 males under the age of 21.
10 females under the age of 21.
8 males aged between 21 and 30.
7 females aged between 21 and 30.
9 males over the age of 30.
6 females over the age of 30.
Calculate the probability that, if one person is selected at random from the group this person will not be a male given that this person is over 30 years:
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