Others Maths Puzzle Numerical Ability

8-{3/2+(3/5-1/2)}
a)6*2/5 b)7*2/5
c)8*2/5 d)9*2/5

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Others Other Question
which of following is greater than 11* 3/4
a)240/18 b)75/10 c)11/5 d)27/4
 if p happens q happens id q happens r happens if r happens then s happens if s has not happened what can be said?
1)p has happend
2)p has not happend
3)r has happend
4)nothing can be said on certainty with p q and r