Question

Mean of x, 3, 4 and 5 is 3 then, the value of x will be:
(a) 4
(b) 6
(c) 10
(d) None of these
​

Answer 1

Answer:

6CO2+________________+6O2

Answer 2

SOLUTION

TO CHOOSE THE CORRECT OPTION

Mean of x, 3, 4 and 5 is 3 then, the value of x will be:

(a) 4

(b) 6

(c) 10

(d) None of these

EVALUATION

Here it is given that Mean of x, 3, 4 and 5 is 3

So by the given condition

$\displaystyle \sf{ \frac{x + 3 + 4 + 5}{4} = 3 }$

$\displaystyle \sf{ \implies \: \frac{x + 12}{4} = 3 }$

$\displaystyle \sf{ \implies \: x + 12 = 12 }$

$\displaystyle \sf{ \implies \: x = 0 }$

Hence the value of x = 0

FINAL ANSWER

Hence the correct option is

(d) None of these

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