Answer:
4.50 in scientific notation
4.5 × 100
The probability is 0.1429.
The probability that the first person chosen is a boy is 5/7. The probability that the second is a boy is 4/6; the third, 3/5; and the fourth, 2/4. Both the numerator and denominator decrease every time, because you lose a boy to choose from and you lose a student to choose from as well. This gives us:
5/7(4/6)(3/5)(2/4) = 120/840 = 0.1429.
There is 24 hours in one day so there is 15 days in 360 hours. You can double check by doing 15 times 24.
REWARDING BRAINLY
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