Q17 of 98 Page 705

Cards, each marked with one of he numbers 6, 7, 8, ...., 15, are placed in a box and mixed thoroughly. One card is drawn at random from the box. What is the probability of getting a card with number less than 10?

Total numbers of elementary events are 15 – 5 = 10


Let E be the event of drawing card less than 10


Favourable numbers are: 6, 7, 8, 9


Numbers of favourable outcomes = 4


P (E = 4/10 =2/5

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