Question

if the mean of 7,8,a,10,b,16 is 11, then
a) a+b = 15
b) a - b = 25
c) a + b = 25
d) a - b = 15​

Answer 1

Answer:

Answer is option (c) a + b = 25

Mean = Average

Average = Sum of the numbers / How

many number

I hope it's help you please mark me as Brainlist.

Answer 2

Step-by-step explanation:

Question :-

If the mean of 7, 8, a, 10, b, 16 is 11, then

a) a + b = 15

b) a - b = 25

c) a + b = 25

d) a - b = 15

Solution :-

According to the question,

${\bold{\sf{: \: ⟹ \: \: \: \: \: \frac{7 \: + \: 8 \: + \: a \: + \: 10 \: + \: b \: + \: 16}{6} \: = \: 11}}}$

${\bold{\sf{: \: ⟹ \: \: \: \: \: 7 \: + \: 8 \: + \: a \: + \: 10 \: + \: b \: + \: 16 \: = \: 11 \: × \: 6}}}$

${\bold{\sf{: \: ⟹ \: \: \: \: \: 41 \: + \: a \: + \: b \: = \: 66}}}$

${\bold{\sf{: \: ⟹ \: \: \: \: \: a \: + \: b \: = \: 66 \: - \: 41}}}$

${\bold{\sf{: \: ⟹ \: \: \: \: \: a \: + \: b \: = \: 25}}}$