Question

If AM of a, a+3, a+6, a+9 and a+12 is 10, then a is equal to

Answer 1

$A.M \:of \: a , a+3,a+6,a+9 \:and \: a+12 \\s \:10\: (given )$

$\implies \frac{ Sum \:of \:the \: observations }{ Number \:of \: observations } = 10$

$\implies \frac{ a+(a+3)+(a+6)+(a+9)+(a+12)}{5} = 10$

$\implies \frac{ 5a + 30}{5} = 10$

$\implies \frac{ 5(a + 6)}{5} = 10$

$\implies a + 6 = 10$

$\implies a = 10 - 6$

$\implies a = 4$

Therefore.,

$\red{ Value \:of \: a } \green {= 4 }$

•••♪

Answer 2

Step-by-step explanation:

..............

simple solution