plz explain it......
If a c oin is t ossed twice we g et, Rs 5 i f two
heads appear, Rs 2 if one head appear, Rs 1 if
no head appear. Then the expected income is
a) 3.5 b) 2.5 c) 4 .5 d) 5.5
ans is 2.5 becoz the prob. of getting 2 heads is 1/4 and getting 1 head is 1/2 and getting o heads is 1/4 so 5*1/4+2*1/2+1*1/4=2.5
am i correct
plz reply
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