Q9.The number of ways in which the following prize be given to a class of 30 boys first and second in mathematics, first and second in physics, first in chemistry and first in English is
Q10.A, B, and C try to hit a target simultaneously but independently. Their respective probabilities of hitting the target are 3/4 , 1/2 , 8/5 . The probability that the target is hit by A or B but not by C is
Answer : Option AExplaination / Solution:
Total Question/Mark :
Scored Mark :
Mark for Correct Answer : 1
Mark for Wrong Answer : -0.5
Mark for Left Answer : 0