Q). From a tower of 120 m high, the angle of depression of a car is 30°. Find how far the car is from the tower.
A) 120/√3 m
B) 60√3 m
C) 80√3 m
D) 120√3 m
Q). The probability of an impossible event is
A) 3
B) 1
C) 2
D) 0
Q). A box contains 7 red marbles, 8 white marbles. What is the possibility of not getting red marble?
A) 7/15
B) 8/15
C) 2/15
D) None
Q). One card is drawn from a well – shuffled deck of 52 cards. What is the probability of getting an ace?
A) 1/13
B) 2/13
C) 3/13
D) 4/13
Q). If a die is rolled once, what is the probability of getting a prime number?
A) 2
B) 1
C) 1/4
D) 1/2
Q). The mean of 6, 5, 4, x, 2 is 4. What is the value of x?
A) 3
B) 4
C) 5
D) 6
A) 3
Explanation: Mean of 6, 5, 4, x, 2 is 4
X =
= 417+x = 20
⇒ x = 20-17
= 3
Q). What is the median of 16, 12, 4, 5, 6?
A) 5
B) 16
C) 6
D) 12
Q). Find mode of 7, 2, 3, 4, 3, 3, 4.
A) 2
B) 4
C) 7
D) 3
Q). The mid values of the class is used to calculate
A) Arithmetic mean
B) Median
C) Mode
D) None
Q). If Median = 60, Mean = 61, then Mode =
A) 58
B) 38
C) 48
D) 68