self Maths Puzzle

In a class of 30 students, 12, 16, 15, 22 and 18 students have passed in Phy, Chem, Biology, Maths and English respectively. What is the maximum possible number of students who passed in at most two
subjects?

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self Other Question
(2467)153*(341)72 A test has ten questions. Points are awarded as follows:
• Each correct answer is worth 3 points.
• Each unanswered question is worth 1 point.
• Each incorrect answer is worth 0 points.
How many different scores are possible ?
a) 31
b) 30
c) 29
d) 28
e) 27