Challenge Of The Day
If a rainy day occurs on every 10th day and each rainy day accounts for half rainbow then in 20 days what is the percentage of days when rainbow doesn\'t takes place.
In the first 10days there is no rainbow for 9 days and on 10th day it is just for half day so in every ten days 9.5 days don't have rainbow.
so for 20 days 9.5*2 days dont have rainbow
(19/20)*100=95% is the answer
90%
90% is correct answer.. as we can't count half day. because full day is responsible for that half rainbow.
In 20 days, there will be 2 rainy days and it accounts for 1 rainbow. So, no. of days when rainbow does not takes place = 18. percentage= (18/20)*100=90%. Ans is 90%
answer will be [(9+1/2+9+1/2)*100/20]=95%.
ther are total 19 days not having the occurrence of rainbow.
so % = (19/20)*100
= 95 %
there are 19 days as there are 18 days + 10th day(1/2) + 20th day(1/2)
=18+1/2+1/2
=19.
hence the percentage is = 95%
ans is 90%
ans is 90%
Probability of occurence = (2/20) * 100 = 10%
Not occurence = 100-10 = 90% days
Please Explain Clearly