Question

3. The mean age of 17 teachers of a school was 33 years. One new teacher aged 24 years ja
the school. Find the new mean age of 18 teachers.​

Answer 1

Step-by-step explanation:

mean = sum /no.

33 = sum / 17

sum =33 ×17

=561

new sum = 561 + 24

=585

new mean = 585 / 18

= 32. 5

huge{\mathfrak{\blue{\bigstar{Be-brainly}}}}★Be−brainly

Answer 2

$\mathfrak{\huge{\green{\underline{\underline{Answer:-}}}}}$

Mean age of 17 teachers = 33 years

Sum of the ages of 17 teachers = 33 × 17 = 561

[ °.° Sum of all observation = Mean × No. of observations ]

Age of new teacher = 24 years

Sum of the ages of 18 teachers = (561 + 24) years = 585 years

$Mean \: age \: of \: 18 \: teachers = \frac{585}{18} \: years = 32.5 \: years$

Thus, mean age of 18 teachers is 32.5 years.

$\large\color{blue}{I \: hope \: this \: answer \: will \: be \: helpful.}$

$\huge\dag\sf\blue{By \: Divyanshu}$