jnu 2012

[manisha sachdeva]

a student must choose one of the subjects-phsyics,chemistry and maths.
she is equally likely to choose physics or chemistry and twice as likely to choose maths.
the probability that the students choose maths is?

how do we solve this ques

[Homer Simpson]

let probability of choosing physics be x

prob(chemistry) = x and prob(math) = 2x

so x+x+2x = 1
=> 4x = 1

so prob(math) = 1/2

[manisha sachdeva]

thanx tsuki,..can u plz answer ques from 22 to 25
and ques 76 to 79 of year 2012 from jnu.
PLEASE

[Aish]

Please somebody help how to do  que 70- 75 also....