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থিম নির্বাচন

আপনার পছন্দের থিম বেছে নিন।

Certain number of children were playing a game of football. There was a trial taking place on the field. In this trial the probability that a goal is scored is 2/5. The probability that a girl hits a goal is 7/10 whereas the probability that a boy hits a goal is 1/5. What will be the probability that not only a goal is hit but it is also hit by a boy?

A. 14/50
B. 7/50
C. 2/5
D. 2/25
সঠিক উত্তরঃ D. 2/25
Explanation: