Question

please answer this question.
with explanation ​

Answer 1

Step-by-step explanation:

mean= sumation x÷n

given mean = 48

n=20

48×20=480 = sum of x

new sum of x =480+60+58

= 598

new sum of x= 598

new n = 20+2=22

new mean = 598÷22

=27.18

~ 27.2kg

please mark me brainliest

Answer 2

GIVEN :-

• Mean weight of a class of 20 students is 48 kg.
• Two more students weighing 60 kg and 58 kg respectively join the class.

TO FIND :-

• The New mean.

SOLUTION :-

$\\ : \implies \displaystyle \sf \: weight \: of \: 20 \: students \: = 48 \times 20$

$: \implies \underline{ \boxed{\displaystyle \sf \: weight\: of \: 20 \: students \: = 960}}$

$\underline{ \bigstar \: \textsf{According to the Question}}$

$\dashrightarrow \displaystyle \sf \: Sum \: of \: observation = 960 + 60 + 58$

$\dashrightarrow \underline{ \boxed{ \displaystyle \sf \: Sum \: of \: observation = 1078}}$

Now,

$\\ \dashrightarrow \displaystyle \sf \: no. \: of \: observation = 20 + 2$

$\dashrightarrow \underline{ \boxed{\displaystyle \sf \: no. \: of \: observation = 22}}$

________________…

$\\ \dashrightarrow \displaystyle \sf \: new \: mean = \dfrac{sum \: of \: observation}{\: no. \: of \: observation }$

$\dashrightarrow \displaystyle \sf \: new \: mean = \frac{1078}{22}$

$\dashrightarrow \underline{ \boxed{\displaystyle \sf \: new \: mean = 539}}$

$\therefore\underline{ \textsf{Mean of class now \: (new \: mean) is 539}}$