If a and b are roots, then
ab = 1/(I - m) = 2a^2
a + b = I/(m - I) = 3a

=> 2I^2/9(I - m)^2 = 1/(I - m)
=> 2I^2 - 9I + 9m = 0

=> 81 - 72m 0
=> m 9/8

Ohh and help for this question as well

Q.In a packing unit of a chemical factory,one machine fills the bottles at rate of 25 bottles per min & needs to be switched off for 10 mins after filling every 500 bottels.Another machine can seal the filled bottles at the rate of 400 bottles per min & needs to be switched off for 5 mins after every 400 bottles. If both the machines start at the same time, that is 8 am, find the earliest time at which 4000 packed & sealed bottles will be ready for delivery?
a)12:10
b)12 noon
c)12:05
d)11:50

(I got 12:10 but the correct answer is 12:05)

Xane Says

7^3 = 343... so 3 must be te 12th digit from left.. or 1st from right..

gs4890 Says

answer has to be cbd. there are so many possibilities bhai and how did u come out to know that rohan's current age is 14.

Draw venn diagram and check for people who are reading BT+BI. these are 12. we remove them and move them to BI+BW category.
remaining will come from BT ONLY category.

total people not reading BI or BW = 300 - (207 +4) = 99

not in options. Not sure what went wrong.
Can anyone check?

A survey of 300 respondents showed that 135 of them read Business India ,125 read Business Today and 115 read Business World .Further ,42 of the respondents read Business India and Business Today,48 read Business Today and Business World ,43 read Business India and Business World and 30 of the respondents read all the three magazines

Q2) If 16 of the respondents who were reading Business Today ,stop reading Business Today and instead start reading Business world , then what is the maximum number of respondents who will not be reading Business India and Business World

(1) 59
(2)55
(3)75
(4) 63

plzz postr the approach as well

Krazy_me Says

Bhai, can you please explain the bold part? Didn't get!

puys pls solve this sum..
m not getting it