Question

There are 99 students standing in a line.every 10th students from the beginning was given a school flag to hold.the third student is given a staff and there after every 10th student is given a staff. How many students are holding a flag and how many holding a staff?

Answer 1

9 Students are holding flag and 33 students are holding a staff

Answer 2

Answer:

9 students hold flag

10 students hold staff

Step-by-step explanation:

for flag

let us assume that the first student is 1 second is 2 third 3 and so on

10 ,20 ,30 ,....................... hold a flag

this form an AP

last student is 99

a=10 d=10

nth term is 99

99 = a+(n-1) d

99 = 10 + [n-1] 10

89 = [n-1] 10

n-1 = 8.9

n = 9.9

we should take the integral part of it

⇒n = 9

9 students hold the flag

similarly

we can do the same in the case of staff to get the value of n as 10.6

so the integral value of 10.6 is 10

and hence the answer for the staff is 10

hope this helps

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