The probabilities that a student will receive an A,B,C,D grade are 0.3,0.38,0.22,0.01 respectively. what is the probability that a student will receive atleast B grade?

• the ans given is 0.68
• 10 years agoHelpfull: Yes(1) No(1)
• .68
  bhar me jao
• 10 years agoHelpfull: Yes(1) No(0)
• as per given data the probability of not getting b grade will be .3+.22+.01=.53
  so p of getting b = 1-.53=.47
• 10 years agoHelpfull: Yes(0) No(7)
• prob of geting atleast b grade means
  prob(a)+prob(b) = 0.30+0.38 = 0.68
• 10 years agoHelpfull: Yes(0) No(1)
• ans:0.3+0.38
  =0.68
• 10 years agoHelpfull: Yes(0) No(2)