Question

the heights(in cm) of 7 students are 142, 153, 166, 161, 165, 149, 156. Find their mean height ​

Answer 1

Step-by-step explanation:

mean = sum of all heights / number of people considered

Mean = (142 + 153 +166 + 161 + 165 +149 +156)/7

= 1092/7

= 156.

mean height is 156 cm

Answer 2

Solution:-

━━━━━━━━━━━━━━━━━━━━━━━━━━

$\large\to{\underbrace{\underline{\sf{Understanding\:the\:concept:-}}}}$

$\dashrightarrow$Here, the question has given us the heights (in cm) of 7 students that are:- 142, 153, 166, 161, 165, 149, 156. Now the question has asked us to find the mean height. So, we simply have to apply the formula of mean and solve to get the mean height of u students.

ANSWER:-

☯ The mean height of 7 students is 156 cm.

GIVEN:-

⟶ Heights of 7 students (data) = 142, 153, 166, 161, 165, 149, 156

TO FIND:-

⇾ Mean height = ?

FORMULA:-

$\to \bf{Mean = \dfrac{Sum \: of \: total}{Number \: of \: terms}}$

SOLVING BY APPLYING THE FORMULA:-

↬ Mean = Sum of total / Number of terms

↬ No. of terms = 7

↬ Mean = 142 + 153 + 166 + 161 + 165 + 149 + 156

↬ Mean = 1092 / 7

↬ Mean = 1092 / 7 = 156

↬ Mean = 156

Hence, we got the answer. The mean height of the 7 students is 156 cm.

━━━━━━━━━━━━━━━━━━━━━━━━━━