the table shows the number of minutes Tim has for lunch and study hall. he calculates that these two periods account for 18% of
the minutes he spends at school .how many minutes does he spend at school?
1 answer:
Tim spends 500 minutes at the school.
Step-by-step explanation:
Given,
Time for lunch = 45 minutes
Time for study hall = 45 minutes
Total = 45+45 = 90 minutes
This represents 18% of the total minutes Tim spend at school.
Let,
x be the total minutes Tim spend at school.
18% of x = 90 minutes
Dividing both sides by 0.18
Tim spends 500 minutes at the school.
Keywords: percentage, division
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Answer:
a. 0.0000
b. 0.9949
c. 0.0212
d. 1.0000
Step-by-step explanation:
a. This is a binomial probability distribution problem of the form:
#Given n=15, p=0.56, the probability of none will order a non-alcoholic drink:
Hence, the probability that none will order a non-alcoholic drink is 0.0000
b. The probability that at least 4 will order a non-alcoholic drink is:
Hence, the probability of at least 4 non-alcoholic orders is 0.9949
c. The Probability that fewer than 5 orders will be made is calculated as:
Hence, the probability of less than 5 orders is 0.0212
d. The probability of all orders being non-alcoholic is equivalent to 1 minus no order being non-alcoholic.
-From a above, the probability of zero non-alcoholic order is , P(X=0)=0000045
-Therefore:
Hence, the probability that all orders are non-alcoholic 1.0000
Answer: D.
Step-by-step explanation:
The given sequence:
Here, first term:
Second term:
Third term :
It can be observed that it is neither increasing nor decreasing sequence but having the common ratio.
Common ratio:
So, [as in G.P. nth term=
]
Hence, correct option is D.