A coin will be flipped five times. If the results are either 0, 1, 4, or 5 heads, you will receive Rs.10. If the results are 2 or 3 heads, you will have to pay Rs.5. What is your mathematical expectation?
(a) 0.625 paisa (b) 0.725 paisa (c) 0.825 paisa (d) 0.925 paisa

• 4*10*(1/2)^5+2*(-5)*(1/2)^5
  (1/2) is probability of getting no of heads.
  Therefore calculating above gives 0.825 paisa.
  Hence ans is c.
• 11 years agoHelpfull: Yes(8) No(3)
• a
  30-25/8=0.625
• 11 years agoHelpfull: Yes(0) No(3)