Kathryn deposits 100 into an account at the beggining of each 4 year period for 40 years. The account credits interest at an effective annual interest rate of i. The accumulated amount in the account at the end of 40 years is X. This is 5 times the accumulated amount in the account at the ned of 20 years. Calculate X

X = 6,194.84

Step-by-step explanation:

Step 1

The value of X is:

Step 2

The value of Y is:

Y = A x (20)

Step 3

We are informed that X = 5Y. Therefore,

Step 4

Substituting the above value in X = 5Y:

X = 6,194.84

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

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