Question

the age of 4 student are 16 years 13 years x years and 12years if their average age is 14 years find the value of x​

Answer 1

ages are = 16 , 12, 13 and x

average = 16 +12+13+x / 4

= 41+x/4

but here average is 14

so,

41 + x /4 = 12

41+x = 12× 4

41+ x = 48

x = 7

Answer 2

Answer:

x = 15

Step-by-step explanation:

Age of 1st person = 16

Age of 2nd person = 13

Age of 3rd person = x

Age of 4th person = 12

Given that the average age is 14

ie, Average = Sum / Total no:

14 = (16 + 13 + x + 12)/4

14 = (41 + x)/4

14 * 4 = 41 + x

56 = 41 + x

x = 56 - 41

x = 15

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