The sum of half a number and a third of the same number is 15, find the number

18

Step-by-step explanation:

Let the unknown number be a

Half of the unknown number means 1/2 ×a=a/2

A third of the unknown number be 1/3 ×a=a/3

Then the sum of the two is 15

Which means

a/2+a/3=15

Let the LCM be 6

It will give 3a+2a/6=15

To solve further we will have to cross multiply

3a+2a=6×15

5a=90

Make a the subject of formula by dividing both sides by 5

a=18

Therefore the unknown number is 18

18

Step-by-step explanation:

Let the number be represented as a

From the question, half of a = 1/2a, while a third of = 1/3a

1/2a + 1/3a = 15

5/6a = 15

Cross multiply

5a = 15 × 6 = 90

Divide both sides by 5

a = 90/5

a = 18

Check:

If a = 18, 1/2 of a = 9

And 1/3 of a = 6

Sum of 1/2a + 1/3 a = 9 + 6 = 15

I hope this helps.

describing distributions is one of the key skills you’ll need to earn a high score on the ap statistics exam. if you need proof of this, just flip through some past exam questions, which can be found at the collegeboard website. you’ll notice that the first free response question is almost always a question requiring you to look at a graph and describe it.

step-by-step explanation: just trying to get points sorry : (

the answer is simply just 6n add the two together as they have an n