Question

the average of 4 number is 24 three of its number are 30 ,40 and 20 find the fourth number​

Answer 1

Answer:

fourth number is 6

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Step-by-step explanation:

30+ 40 + 20+x / 4 = 24

90+x = 24 ×4

90 + x = 96

x = 6

Answer 2

Answer: The fourth number is 6

Step-by-step explanation:

Formula for finding an average = Sum of the numbers

                                                          ________________

                                                         Number of numbers

Let the fourth number be x.

Then,

$\frac{30+ 40+20+x}4}$= 24

30 + 40 + 20 + x = 24 x 4 = 96

90 + x = 96

x = 6

Hope this helps

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