Probability of Cristiano Ronaldo scoring a penalty is twice than the probability of missing it. In a World cup he takes 5 penalties, What is the probability of scoring 3 penalties among the 5?

Option:
a) 5*2*((2/3)^3 * (1/3)^3)
b) 1-((2/3)^3 * (1/3)^3)
c) 1-((2/3)^2)

• P+2P=1
  now p=1/3;
  
  so answer is 5c3*(2/3)^3(1/3)^2
• 8 years agoHelpfull: Yes(28) No(1)
• Sorry.....
  Options are:
  a) 5 *2 *((2/3)^3 * (1/3)^2)
  b) 1-((2/3)^3 * (1/3)^2)
  c) 1-((2/3)^2 * (1/3)^3)
• 8 years agoHelpfull: Yes(3) No(0)
• P(s)=2/3, P(m)=1/3
  The probability of scoring 3 = 5c3*(2/3)^3*(1/3)^2
  =5*2*((2/3)^3*(1/3)^2)
• 8 years agoHelpfull: Yes(3) No(0)
• x+(x+1)+(x+2)+(x+3) == 4x+6 = y
  
  y is multiple of 10 only when x's units place is either 1 or 6
  
  1+2+3+4 and 6+7+8+9
  --------------------
  --------------------
  991+992+993+994 and 996+997+998+999
  
  as per the permutations formula
  
  1digit , 2 digit , 3digit numbers are
  
  = 2 + ( 9*2 ) + ( 9 *10 * 2 ) == 200
  
• 8 years agoHelpfull: Yes(0) No(3)