Math, asked by shrutithakkar2019, 6 months ago

If the mean of 4 observations is 20 and when a constant C is added to each observation, the
mean becomes 22, the value of C is:
यदि 4 प्रेक्षणों का माध्य 20 है तथा प्रत्येक में एक नियतांक C जोड़ा जाए तो माध्य 22 हो जाता है, C का मान है
(a) -2
(b) 2
(c) 4
(d)6​

Answers

Answered by isaiahsifuma33
3

Answer:

2

Step-by-step explanation:

X/4=20............... Eq 1

X+4c/4=22...... Eq 2

X=80

So insert value of x in Eq 2

80+4c/4=22

Multiply by 4 on both sides

80+4c=88

4c=88-80

4c=8

C=2

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