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A bag contains 12 blue balls and x red b...

A bag contains 12 blue balls and x red balls. If one ball is drawn at random (i) what is the probaility that it will be a red ball ? (ii) If 8 more red balls are put in the bag, and if the probability of drawing a red ball will be twice that of the probaility in (i), then find x.

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The correct Answer is:
(i) `(1)/(4)`
(ii) x = 4
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NCERT TAMIL-STATISTICS AND PROBABILITY -EXERCISE 8.3
  1. Write the sample space for tossing three coins using tree diagram.

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  2. Write the sample space for selecting two balls from a bag containing 6...

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  3. If A is an event of a random experiment such that P(A) : P(overline(A)...

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  4. Thenmozhi throws two dice once and computes the product of the numbers...

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  5. A coin is tossed thrice. What is the probability of getting two consec...

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  6. At a fete, cards bearing numbers 1 to 1000, one number on one card are...

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  7. A bag contains 12 blue balls and x red balls. If one ball is drawn at ...

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  8. Two unbiased dice are rolled once. Find the probaility of getting. (...

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  9. Three fair coins are tossed together. Find the probaility of getting (...

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  10. Two dice are numbered 1,2,3,4,5,6 and 1,1,2,2,3,3 respectively. They a...

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  11. A bag contains 5 red balls, 6 white balls, 7 green balls, 8 black ball...

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  12. In a box there are 20 non-defective and some defective bulbs. If the p...

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  13. The king and queen of diamonds, queen and jack of hearts, jack and kin...

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  14. Some boys are playing a game, in which the stone thrown by them landin...

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  15. Two customers Priya and Amuthan are visiting a particular shop in the ...

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  16. In a game, the entry fee is Rs. 150. The game consists of tossing a co...

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