Question

Customers of Samsung tablets

Age	< 25,000	25,000-50,000	> 50,000
<25 years	6%	11%	2%
25-35 years	5%	20%	17%
36-55 years	3%	19%	6%
> 55 years	2%	4%	5%

Determine the following probabilities:
1. P (Income greater than $ 25,000) =
2. P (Income less than $ 50,000) =
3. P (Age over 55 years) =
4. P (Age younger than 36 years) =
5. P (Age between 25-55 or Income greater than $ 50,000) =
6. P (Age between 25-35 and Major income $ 50,000) =
7. P (Income less than $ 25,000 and age between 25-55 years) =
8. P (Age younger 55 and Income less than $ 50,000) =

Answer 1

1. P (Income greater than $ 25,000) = (11+20+19+4+2+17+6+5)% = 84% =0.84
2. P (Income less than $ 50,000) =( 6+5+3+2+11+20+19+4)% = 70% =0.70
3. P (Age over 55 years) =(2+4+5)% = 11% = 0.11
4. P (Age younger than 36 years) = (6+11+2+5+20+17)%= 61% = 0.61
5. P (Age between 25-55 or Income greater than $ 50,000) = ( 5+20+17+3+19+6+2+5)% = 77% =0.77

6. P (Age between 25-35 and Major income $ 50,000) =17% = 0.17
7. P (Income less than $ 25,000 and age between 25-55 years) = (5+3)% = 0.08
8. P (Age younger 55 and Income less than $ 50,000) =( 6+11+5+20+3+19)% = 64% =0.64