question_answer

In a medical examination of students of a class, the following blood groups are recorded:
Blood group	A	B	O	AB
No. of students	35	28	19	13
A student is selected at random from the class. The probability that he/ she has blood group other than ?O? is _______

A) \[\frac{1}{5}\]                                                              

B) \[\frac{7}{19}\]

C) \[\frac{13}{95}\]                                                                       

D) \[\frac{4}{5}\]

E) None of these