Q. 95.0( 5 Votes )
The following table shows the blood groups of 40 students of a class.
One student of the class is chosen at random. What is the probability that the chosen student has blood group(i) O? (ii) AB?
Answer :
Total number of Students: 40
Number of Students having blood group O: 14
Number of Students having blood group AB: 6
Probability P() = 
1.Let P(O) be probability of selecting a student with Blood group O
P (O) = 
P (O) = 
= 0.35
2.Let P(AB) be probability of selecting a student with Blood group AB
P (AB) = 
P (AB) = 
= 0.15
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