Question

Can someone answer this ASAP...
Answer this mean question by ASSUMED MEAN METHOD ONLY..
ANSWER ONLY IF U KNOW​

Answer 1

$\huge\color{lime}\boxed{\colorbox{black}{⭐Answer :-⭐}}$

Mean = 18 ------given .

Sum of fî = 44+f

and ,

sum of fî dî = -40+2f

now , putting the values in the formula

• mean = a + € fidi /€fi
• here €= sigma .

$18 = 16 + \frac{48 + 4f}{44 + f} \\ 18 - 16 = \frac{48 + 4f}{44 + f} \\ 2(44 + f) = 48 + 4 f \\ 2f + 88 - 48 = 4f \\ 2f + 40 = 4f \\ 4f - 2f = 40 \\ 2f = 40 \\ f = \frac{40}{2} \\ f = 20$

$\bigstar\purple{\boxed{so \: f \: = 20}}$

• hope it helps you..
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• abhi230204 ☺✌⚘

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