Question

Average age of employees in an organization is
40 years. When 120 new employees whose
average age is 32 years joined the organization,
the average age is decreased by 4 years. Find
the number of employees of the organization
after joining of the new employees ?​

Answer 1

6 years agoHelpfull: Yes(9) No(1)formula for dis type of ques :The average age of N persons is x years.If M person joins then,the average is decreased by y years,then avg age of new comers is : x+{1+(N/M)}y years.

Here avg age f new comers=32

x=40

M=120 and y=4,we can find N from the formula n den add 120 for total students.6 years agoHelpfull: Yes(4) No(3)only calculation

suppose there were x students initially

40*x+32*120/120+x=36

40x-36x=120*36-120*32

4x=120(36-32)

4x=120*4

x=120

total x+120

240 ans.

x6 years agoHelpfull: Yes(2) No(2)(40*n+32*120)/n+120=36

n=120

total=120+120=2405 years agoHelpfull: Yes(2) No(0)what do u mean by adult school?Plz modify the question4 years agoHelpfull: Yes(1) No(0)14 posts at each side. so total 56 posts . but there is 1 post common at each corner. so total 56-4 = 52 no of posts..6 years agoHelpfull: Yes(0) No(3)240,d option.

120*32+40y=36(120+y); where y is no. of old students.

solving for y.

y=2406 years agoHelpfull: Yes(0) No(0)ans:240

easy way to do this is

consider x persons for 40y

total avg we get is 40-4=36

32-36=-4*120=-480

40-36*x=480

x=120;

120+120=1406 years agoHelpfull: Yes(0) No(0)(d)240

(x*40)+(120*32)=36*(120+x)

x=120

now the no of student is 120+120=240;

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