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algol13
3 years ago
11

At a school. Number of boys:number of girls=11:9. There are 124 more boys than girl. Work out the total number of students at th

e school
Mathematics
1 answer:
JulsSmile [24]3 years ago
5 0

Answer:

Total students = 1240

Step-by-step explanation:

Given that,

Number of boys: number of girls=11:9

\dfrac{x}{y}=\dfrac{11}{9}\\\\9x=11y ......(1)

There are 124 more boys than girls i.e.

x = 124+y .....(2)

Put the value of x from equation (2) in equation (1). So,

9(124+y) = 11y

1116 +9y = 11y

1116 = 2y

y = 558

Put the value of y in equation (2).

x = 124+558

x = 682

Total students = x+y

= 682+558

= 1240

So, there are 1240 students at the school.

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Step-by-step explanation:

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# P = Invested Amount

# I = Interest Amount

# r = Rate of Interest per year in decimal; r = R/100

# t = Time Period involved in months or years

* Lets solve the problem

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- Account B pays 4​% annual interest

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- Let B represent the amount of money invested in the account B

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# Account A :

∵ Account A has $A invested

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