Question

pls help me in question 11​

Answer 1

20 is the answer

Step-by-step explanation:

Mean weight = total weight sum / no of students

$20 \times 20 = total \: weight$

$400 = total \: weight$

$after \: removing \: 20 \: kg$

$400 - 20 = new \: weight$

$380 = new \: weight$

$19 = new \: students$

$mean \: = \frac{380}{19} = 20$