Math, asked by yashikarora20, 9 months ago

The mean weight of 5 men
is 50 kg and mean weight of 4
women is 40 kg. Arvind the
mean weight of all the 9
people.

Answers

Answered by gauravjacker9602

Step-by-step explanation:

Consider the five people are a, b, c, d, e and let their average be x.

(a+b+c+d+e)/5=x

a+b+c+d+e= 5x

Let the person weighing 50kg be a

50+b+c+d+e=5x

b+c+d+e=5x-50

Let the new person be f

(b+c+d+e+f)/5=x-2

b+c+d+e+f=5x-10

5x-50+f=5x-10

f=50–10=40kg

The average weight of 5 person's increases by 4 kg when a new person comes in place of one of them weighing 50kg. What is the weight of the new person?

The average weight of 8 persons increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person?

The average weight of 9 person's increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person?

The average weight of 8 people increases by 2.5 kg when a new person comes in place of one of them weighing 45 kg. What is the weight of the new person?

The mean weight of 150 student in class is 60 kg. The mean weight of boys is 70 kg, while that of girls is 55 kg, find the number of boys and numbers of girls in the class?

Let us assume average weight of 5 persons is 50 kg.

=> Total weight = 250 kgsk

If another person replaces a person weighing 50 kgs thereby reducing average by 2 kgs, the total weight of the new group = 5 x 48 = 240 kgs.

=> Weight of new person

= 240 - (250 - 50) = 40 kgs

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If the words of the question is accurate it is 50kg. If this 50 kg person is added in place one of the other 5 persons then the weight of the person leaving the group would be 58kg. ,that will average 2kg less for the remaining four.

My answer appears as confused as the question.

Total weight increased = (5x 2) kg = 10 kg.

Weight of new person = (50-10) kg = 40 kg

The average weight of 15 students in a class increases by 1.5 kg when one of the student weighing 40 kg is replaced by new student. What is the weight (in kg) of the new student?

The average weight of the students in a class of 35 students is 40 kg. If the weight of the teacher was to be included and the the average rises by .5 kg, what is the weight of the teacher?

The average weight of 8 person's increases by 5 kg when a new person comes in place of one of them weighing 35 kg. What might be the weight of the new person?

The average weight of 12 people increases by 4 kg when a new person comes in place of one of them weighing 70 kg. What is the weight of a new person?

The average weight of 5 men is decreased by 3 kg when one of them weighing 150 kg is replaced by another person. What is the weight of the new person ?

-10 kg = 50

X = 40 kg

new person= -10 + 40 = 30 kg