Mathematics
A bag contains 18 balls out of which x balls are white. (i) If one ball is drawn at random from the bag, what is the probability that it is white ball? (ii) If 2 more white balls are put in the bag, the probability of drawing a white ball will be times that of probability of white ball coming in part (i). Find the value of x.
Related Questions
A box has cards numbered 14 to 99. Cards are mixed thoroughly and a card is drawn at random from the box. Find the probability that the card drawn from the box has
(i) an odd number
(ii) a perfect square number.
A bag contains 5 red balls and some blue balls. If the probability of drawing a blue ball is four times that of a red ball, find the number of balls in the bag.
A card is drawn from a well shuffled pack of 52 cards. Find the probability that the card drawn is :
(i) a red face card
(ii) neither a club nor a spade
(iii) neither an ace nor a king of red colour
(iv) neither a red card nor a queen
(v) neither a red card nor a black king.
From pack of 52 playing cards, black jacks, black kings and black aces are removed and then the remaining pack is well-shuffled. A card is drawn at random from the remaining pack. Find the probability of getting
(i) a red card
(ii) a face card
(iii) a diamond or a club
(iv) a queen or a spade.