sir problem says find out that exactly one of a or b or c occur so i applied the formula no.3 which u have given in 1st slide i.e for exactly one out of 3 occuring. But still answer is not coming.

Ayush jha

6 months ago

The formula is for at least one , the question says exactly one

Keshav Verma

3 months ago

If you've got the answer for the 1st question then the second question is too easy. 1st question asks for probablity of 2 or 3 events occuring together which is 1/3. 2nd qustion asks for probablity of only 1 event occuring. Now probablity of 1, 2 or 3 events occuring together is 1 i.e P(AUBUC)=1, so probablity of only 1 event occuring is 1-(1/3)=2/3

Spandan Dash

3 months ago

Thanks Keshav

easy

sir please solve question

Vineet Loomba

6 months ago

That is covered in separate course of most important questions

PROBABILITY FoR SURe SHoT SUcCESS IN JEE MAIN AND ADVANCED (IIT-JEE) JEE MAIN RANK BOOSTER COURSE PREPARED BY ER. VINEET LOOMBA ITIAN IIT-JEE MENTOR
100% SUCCESS IN JEE MAIN AND ADVANCED (IIT-JEE) ABOUT ME B. Tech. From IIT Roorkee IIT-JEE Mentor Since 2010. * Many of my students are pursuing courses in IITs, NITs, BITs etc unacademy Currently running my own Coaching Institute for JEE Main and Advanced Search vineet loomba unacademy on GOOGLE
100% SUCCESS IN JEE MAIN AND ADVANCED (IIT-JEE) SET THEORY IN PROBABILITY A n B or AB represent the occurrence of both A & B simultaneously "Au B" or A B represent the occurrence of either A or B. (i) For two events A and B A B (a) Pat least one out of them) P(A) + P(B) PAnB) (b) P (exactly one out of them)-P(A)+ P(B)-2 P(AnB) For three events A, B and C P(at least one out of them) P(A) +P(B)+P(C)-P(AnB)-P(Bnc)-P(CnA)+P(AnBnc) (ii) P(A) 1-P(A) SUCCESS IN JEE MAIN ER. VINEET LOOMBA (IIT RooRKEE)
100% SUCCESS IN JEE MAIN AND ADVANCED (IIT-JEE) A An BnC nCnB CnBr SUCCESS IN EE MAIN ER. VINEET LOOMBA (IIT RooRKEE)
100% SUCCESS IN JEE MAIN AND ADVANCED (IIT-JEE) Example A bag contains 4 white, 3red and 4 green balls. A ball is drawn at random. Find the probability of the event the ball drawn is white or green Solution LetA be the event 'the ball drawn is white and B be the event the ball drawn is green' P(The ball drawn is white or green) 8 P (AuB)P(A) P(B) P(A n B) SUCCESS IN JEE MAIN ER. VINEET LOOMBA (IIT RooRKEE)
100% SUCCESS IN JEE MAIN AND ADVANCED (IIT-JEE) Example In throwing of a die, let A be the event 'an odd number turns up', B be the event 'a number divisible by 3 turns up' and C be the event 'a number s 4 turns up Then find the probability that exactly two of A, B and C occur Solution Event A = {1, 3, 5), event B = {3, 6} and event C = {1, 2, 3, 4} Thus P(exactly two of A, B and C occur) SUCCESS IN JEE MAIN ER. VINEET LOOMBA (IIT RooRKEE)
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