A train 170 m long is running at a speed of 22.5 km/hr. what time will it take to cross a 80m long bridge?

(A) 15 Sec
(B) 20 Sec
(C) 40 Sec
(D) 45 Sec

In a batch, there are 22 boys and 18 girls. Three students are selected at random. The probability that 1 girl and 2 boys are selected, is:

(A) 3794/8854
(B) 8514/9890
(C) 2178/4320
(D) 4158/9880

Two dice are rolling simultaneously .What is the probability that the sum of the number on the two faces is divided by 5 Or 7.

(A) 13/36
(B) 14/36
(C) 9/36
(D) 11/36

A Receptacle contains 3violet, 4purple and 5 black balls. Three balls are drawn at random from the receptacle. The probability that all of them are purple is:

(A) 7/55
(B) 3/55
(C) 1/55
(D) 9/55

Two dice are thrown together. The probability that the total score is a composite number is:

(A) 5/12
(B) 12/7
(C) 7/12
(D) 12/5

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