In an examination there are three multiple choice questions and each question has 5 choices .
Number of ways in which a student can fail to get all answer correct is
A. 125
B. 124
C. 64
D. 63
Answer : Option BExplaination / Solution: No Explaination.
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
A. 304 x 292
B. 303 x 293
C. 302 x 294
D. 30 x 295
Answer : Option AExplaination / Solution: No Explaination.