Question

In a school 50% of the students are younger than 10, 1/20 are 10 years old and 1/10 are older than 10 but younger than 12, the remaining 70 students are 12 years or older. How many students are 10 years old?

Answer 1

Do you have any guesses or any options

Answer 2

nope

Answer 3

I think it might it may be 4

Answer 4

i tried that its not right

Answer 5

my second guess is 2

Answer 6

okay ill try that

Answer 7

k

Answer 8

not right

Answer 9

try 10

Answer 10

okay

Answer 11

not right

Answer 12

@jabez177 can you help

Answer 13

Okay. 50% or \(0.50\) are younger than \(10\).

\(0.10\) are older than \(10\) but they are also younger than \(12\)

So, \(70\) students are \(12\) or older

We need to find out how many are 10 years olf. How many are 10 yrs old?

We would solve this equation: \(0.50+0.05+0.10=0.65=\) 65%

So, 70 are 35%

Now you would do, \(70/0.35=200\) in total

So, \(200*0.05=10\) students ten years old

Answer 14

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Answer 15

@AihberKhan I tried that number already :P

Answer 16

It should be 10...

@DAVPAS1