Q2 of 18 Page 73

A box contains four slips numbered 1, 2, 3, 4 and another box contains two slips numbered 1, 2. If one slip is taken from each, what is the probability of the sum of numbers being odd? What is the probability of the sum being even?

Let box 1 contains slip numbered 1, 2, 3 and 4 and box 2 contains slips numbered 1 and 2.


Let make pair of outcome from different boxes


i.e. (outcome of box 1, outcome of box 2)


Outcomes:


(1, 1), (2, 1), (3, 1), (4, 1)


(1, 2), (2, 2), (3, 2), (4, 2)


Total number of outcomes = 8


Outcomes having sum of the numbers as odd = 4


Outcomes having sum of the numbers as even = 4


Probability of the sum of numbers being odd




= 0.5


Probability of the sum of numbers being even




= 0.5


More from this chapter

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5

In each picture below, the explanation of the green part is given. Calculate in each, the probability of a dot put without looking to be within the green part.

A regular hexagon formed by two overlapping equilateral triangles.


 1

Rajani has three necklaces and three pairs of earrings, of green, blue and red stones. In what all different ways can she wear them? What is the probability of her wearing the necklace and earrings of the same colour? Of different colours?

 3

A box contains four slips numbered 1, 2, 3, 4 and another contains three slips numbered 1, 2, 3. If one slip is taken from each, what is the probability of the product being odd? The probability of the product being even?

 4

From all two-digit numbers with either digit 1, 2, or 3 one number is chosen.

i) What is the probability of both digits being the same?


ii) What is the probability of the sum of the digits being 4?