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

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4/10........

as....total no. of cards=10

no. of cards with less than 10=4 i.e. nos. 6,7,8 and 9

as....total no. of cards=10

no. of cards with less than 10=4 i.e. nos. 6,7,8 and 9