Question

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Answer 1

Q2)

10 balls = 250

1 ball = 25

15 shuttle = 135

1 shuttle = 9

1 ball + 1 shuttle = 25+9 = 34

Q3)

Prime numbers between 20 and 40 ==> 23,29,31,37

hence average = $\frac{23+29+31+37}{4}$ = 120/4 = 30

Q4)

75 girls average weight = 47 kg

Hence total weight = 47 * 75 = 3525 kg

1 weight was misread as 45 instead of 25

hence total weight will decrease by (45-25) = 20

Hence total weight will now be 3525-20 = 3505

So now average weight will become

3505/75 = 46.73 kg

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Answer 2

Answer:

30 is the answer

Step-by-step explanation:

23,29,31 and 37

average =sum of all no.s ÷total no. of no.s

=23+29+31+37=120

therefore,average = 120÷4= 30 .....as the no. of the no.s are 4