If each term in the sum a1+a2+a3+...+an is either 7 or 77 and the sum equals 350, which of the following could be equal to n?A.
1 answer:
Answer:
C. 40
Step-by-step explanation:
Let us say there are x 7's and y 77's.
We have been given that each term in the sum a1+a2+a3+...+an is either 7 or 77 and the sum equals 350. We are asked to find the value of n.
Since the sum of all numbers is 350, so we can represent this information in an equation as:
The only integer solutions for the equation are 10, 20, 30, 40, 50
.
So, there can be these many terms: 10 or 20 or 30 or 40 or 50 .
The given option only contains 40, so 40 would be the answer. For 40 terms to be there, there has to be 39 sevens and 1 seventy-seven.
Let us verify our answer.
Therefore, the total terms (n) could be equal to 40 and option C is the correct choice.
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Relative frequency is the value assigned to each class in the proportion of the total data set that belongs in the class.
Relative frequency formula is :
--------------------(1)
So for class 0 to 5 miles we have 247 fans. So this class frequency is 247.
Total fans surveyed is 500
So plug these values in relative frequency formula given by (1)
relative frequency =
On simplifying we get
relative frequency = 0.494
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Answer:
The amount of stock for which both brokers would charge the same commission is $2500.
Step-by-step explanation:
i) Let the amount of stock to be traded be worth $x
ii) therefore for both the brokers to charge the same commission we can write
1% of x = $25 0.01
x = 25
x =
The amount of stock for which both brokers would charge the same commission is $2500.