Combination of Events
Combination of Events
COMBINATION OF EVENTS:
Mutually Exclusive Events:
If two events cannot occur simultaneously then they are mutually exclusive. If A and B are mutually exclusive events, then
Ex. In drawing a card from a well shuffled pack of 52 cards, consider he following events:
A = the card is a spade, and B= the card is a heart
The two events A and B are mutually exclusive.
Following two events are not mutually exclusive.
(a) The card is a heart (b) The card is a king
Because the card can be king of heart.
Addition Theorem of Probability:
(i) If A and B are two events associated with a random experiment, then
IF A and B are mutually exclusive events then
(ii) If A, B, C are three events associated with a random experiment, then
Example: A bag contains 6 white, 5 black and 4 red balls. FInd the probability of getting either a white or a black ball in a single draw.
Solution: Let A = Event that we get a black ball
Two events A and B are mutually exclusive.
So,
A card is drawn from a well - shuffled pack of cards and it turns out to be a red card . what is the probability of getting a red card , if we pull out one more card at random | |||
| Right Option : B | |||
| View Explanation | |||
A dice is rolled and a card is picked from a well shuffled deck of cards. What is the probability of getting an Ace and an even number ? | |||
| Right Option : C | |||
| View Explanation | |||
A bag contains 10 blue and 5 black balls . if two balls are drawn simultaneously and the first ball turns out to be blue , what is the probability that the second ball is also blue ? | |||
| Right Option : A | |||
| View Explanation | |||
Students / Parents Reviews [10]
My experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
