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Ashbff18
17.09.2020 •
Mathematics
Share 56 in the ratio of 1:3:4
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Ответ:
1x:3x:4x
1x + 3x + 4x = 8x
8x = 56
x = 7
1(7) = 7
3(7) = 21
4(7) = 28
Check: 7 + 21 + 28 = 56
So 56 can be divided in the ratio of 1:3:4, and it will be 7, 21, 28
Ответ:
Part 1
A used-car lot has 120 vehicles for sale. Since a sample of 15 of these vehicles finds that 6 of them have previously been in an accident. That means that the probability of finding a an accident car is
when the number of cars is 120, the number of accident cars will be:
Thus the best estimate of the percent of the used-car lot's vehicles that have previously been in an accident is 48.
Part 2
The total sample space of the sums has outcomes.
Out of this, the required events are:
Which is 24 in number.
Thus the probability required is