india plays 4 matches with aus and west indies . the probability that india will get 0,1,2 points in a match are .45 , .05  , .50  resp. Find Probability that india gets at least 7 points (in total 4 matches).

(PLEASE EXPLAIN THE ANSWER    )

hi, i am ajay preparing for jee-2007, i have read ur question ,i thought of answering it heres my ans    ,   its like this check out for getting 7and 8 as the maximum u can get is 8by 2,2,2,2in four matches and 7 u can get by 2,2,2,1 right now 2,2,2,2implies that u should get 2 and 2and 2and 2 so multiply the probabilities of getting 2, keep it aside.and for 7 u shd get 2 and 2and 2and 2so multiply the probability of getting 2, three times as there are three 2sand lastly multiply with probability of getting one just add the both ans u got and thats ur ans,why to add is bcoz to get atleast 7 implies 7 or 8         " nou all the best "

hi i am ajay see i mistakenly put 2 and 2 and 2 and 2for seven make the last 2 as 1