Question

a bag contain 36 cards marked with the letter P and several cards marked with the letter Q. if a card is drawn at random, the probability of drawing a letter P is 9/15. several more cards marked with the letter Q sre then added and a card is drawn at random. the probability of drawing a letter P is now 6/11. how many cards marked with the letter Q are there in the bag
who answer coreectly he is genius in maths​

Answer 1

Answer:

answer is I think 30

Step-by-step explanation:

after adding cards the probability of getting P written card was 6/11 and if we do 36/6 that will be 6 and when multiplied with 11 the answer is 66. Therefore total no. of cards after adding some more Q cards is 66. Now we already know that no. of Pcards are 36. therefore no. of Q cards in the bag =66- 36= 30