Q99 of 116 Page 42

Playing cards

(a) From a pack of cards the following cards are kept face down:



Suhail wins if he picks up a face card. Find the probability of Suhail winning?


(b) Now the following cards are added to the above cards:



What is the probability of Suhail winning now? Reshma wins if she picks up a 4. What is the probability of Reshma winning?


[Queen, King and Jack cards are called face cards.]

(a) No. of face cards = 1


⇒ No. of favourable outcomes = 1


Total no. of cards = 7


⇒ No. of outcomes = 7




(b) No. of face cards = 4


⇒ No. of favourable outcomes = 4


Total no. of cards = 15


⇒ No. of outcomes = 15




No. of fours = 4


⇒ No. of favourable outcomes = 4


Total no. of cards = 15


⇒ No. of outcomes = 15




More from this chapter

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97

The following pie chart depicts the expenditure of a state government under different heads.

(i) If the total spending is 10 crores, how much money was spent on roads?


(ii) How many times is the amount of money spent on education compared to the amount spent on roads?


(iii) What fraction of the total expenditure is spent on both roads and public welfare together?


 98

The following data represents the different number of animals in a zoo. Prepare a pie chart for the given data.

 100

Construct a frequency distribution table for the following weights (in grams) of 35 mangoes, using the equal class intervals, one of them is 40 – 45 (45 not included).

30, 40, 45, 32, 43, 50, 55, 62, 70, 70, 61, 62, 53, 52, 50, 42, 35, 37, 53, 55, 65, 70, 73, 74, 45, 46, 58, 59, 60, 62, 74, 34, 35, 70, 68.


(a) How many classes are there in the frequency distribution table?


(b) Which weight group has the highest frequency?

 101

Complete the following table:


Find the total number of persons whose weights are given in the above table.