Math, asked by kpipariyaa, 6 months ago

at a mobile shop 2 samsung, 3 apple and 2 nokia phones are on display. 2 phones are bought on random basis

Answers

Answered by amitnrw
3

Given : at a mobile shop 2 samsung, 3 apple and 2 nokia phones are on display.

2 phones are bought on random basis

To Find :   Probability of all the possible cases

Solution

Samsung  = 2

Apple  = 3

Nokia  =  2

Total  = 7

Total Ways  of selecting 2 mobiles = ⁷C₂  = 21

                                                Ways                   Probability

Both Samsung   Mobile   =   ²C₂ = 1                      1/21

Both Apple    Mobile        =   ³C₂ = 3                     3/21  = 1/7

Both Nokia   Mobile          =   ²C₂ = 1                      1/21

one Samsung one Apple        ²C₁.³C₁ = 6              6/21  = 2/7  

one Samsung one Nokia        ²C₁.²C₁ = 4              4/21

one  Nokia  one Apple            ²C₁.³C₁ = 6              6/21  = 2/7  

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Answered by muskanj550
0

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