Others Maths Puzzle

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what will be the answer

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Others Other Question
Y,Y,H,L,Y,E,Y,T,?,? There are 5 Sub with equal high marks. Mark scored by a boy is 3:4:5:6:7 (Not sure). If his total aggregate if 3/5 of the total of the highest score, in how many subjects has he got more than 50%?