India plays two matches each with West Indies and Australia. In any match, the probabilities of India getting, points 0, 1 and 2 are 0.45, 0.05 and 0.50 respectively. Assuming that the outcomes are independent, the probability of India getting at least 7 points is

Let if India loose gets point 0 Draws gets point 1 Wins gets point 2
India will get point 7 if it wins 3 matches and Draws 1
India will get point 8 if it wins all the 4 matches

Therefore combination of winning 3 matches 2 win with westindies and 1 win and 1 draw with australia or vice versa