Question

in Roman birthday party 90% of his friends came and three friends didn't came find the total number of friends Rohan has

Answer 1

HEY MATE HERE IS YOUR ANSWER

100%-------Total friends (x)
90%--------Total friends-Friends who didn't
came
x-3
Total friends =
$\frac{10}{100} \times x = 3 \\ x = \frac{300}{10} \\ x = 30$

HOPE IT HELPS YOU

FOLLOW ME FOR ANY OTHER QUESTIONS

Answer 2

Hey there!

Sheena here!

_______________________________________________

Before, I come to your question let me explain what is the meaning of percentage.

So what do you mean by percentage?

Well, Percentage means something out of 100

You may heard about it when you say your percentage of your marks out of some number.

So an easy way to calculate the percentage of anything

Given number/original number * 100

Here the given number varies on the way the question is.

If the question is something like:

A student score 9 out of 10 in an exam what is his percentage?

=> Then 9 is the given number where the 'out of' number should be placed in the place of original number.

_____________________________________________

Coming to your question!

Question: in Roman birthday party 90% of his friends came and three friends didn't came find the total number of friends Rohan has?

So, let me explain the question,

There's a boy named Rohan and he has his Birthday party. In His Birthday party he had invited his friends. We aren't told how many friends he invited. So the total number of his friends which we don't know would be 100%.

We are given with a little more piece of information! In his Birthday Party Only 90% of his friends were present. Remaining 10% didn't attend the party. Now, we are told to find the total number of friends Rohan Has.

So Solution:

Let the total number of friends be x

We know that 100%- 90% = 10%

We also know that 10% of x is 3

So, 10/100 * x = 3

∴ 1/10 * x = 3

∴ 1x/10 = 3

∴ x = 3 * 10

∴ x = 30

Therefore, the total number of friends Rohan has is 30 friends.

____________________________________________________

Hope this Helps!

Thanks!