Page 326 - Start Up Mathematics_7

Practice Questions for Problem-Based Learning

Important Instructions

The practice questions given in this paper are in the form of multiple choice questions (MCQs).
The first 35 questions are stand alone MCQs whereas the rest are passage based MCQs. Each
of these questions has four options out of which only one option is correct. A student has to
tick () the correct option.

1. Sameera subscribed to a tariff plan costing ` 50 under which her international call rates were
reduced to ` 4/minute from ` 10/minute charged earlier. How much did Sameera save on her
international talktime of 128 minutes in a week?

(a) ` 768 (b) ` 718 (c) ` 512 (d) ` 462

2. Mr Gupta’s electricity tariff increased from ` 4.8 per unit to ` 6 per unit. What is the percentage
increase in the bill, if Mr Gupta’s consumption was 500 units?

(a) 10% (b) 20% (c) 25% (d) 30%
3. Sudha has a standard pack of 52 playing cards. She lost a queen of hearts, two cards of
diamonds, three cards of clubs and all the kings. If she draws a card at random, which of the
following is least likely to occur?
(a) A heart (b) A diamond (c) A club (d) A spade

4. During the screening of a film in an auditorium, seats numbered 107 to 156 are left vacant. If
the capacity of the auditorium is 250, the probability of a vacant seat is:

(a) 1 (b) 2 (c) 49 (d) 156
5 5 250 250
5. A box contains 3 black pearls, 7 white pearls and 5 red pearls. One of the pearls is lost. The
2
probability that Shikha picks a red pearl is . The colour of the lost pearl is:
7
(a) black (b) white (c) red (d) none of these

6. What is the probability of getting a 5 in the given wheel? 3

(a) 1 (b) 1 (c) 1 (d) 1 1 5
4 3 2

7. A boy while going to school does a survey and concludes that every 3 days out of 10, his bus
passes by without stopping at the traffic light. The probability that the bus has to stop at the
red light is:

(a) 0.3 (b) 0.5 (c) 0.7 (d) 1

8. The probability of which of the following event is greatest?
(a) Impossible (b) Unlikely (c) Equally likely (d) Certain

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