12. The probability of guessing the corec f 2t:1suer tw a certain test

1.	12. The probability of guessing the corec f 2t:1suer tw a certain test is 2 Ifthe prohatbliyof not guessing the correct answer to this question is . then lind the valure of12. The probability of guessing the cornectis certai:i test is 1Ifthe probability3301
Answer» E be the event of guessing correct so E' is event of of incorrect . We know, P(E) + P(E') = 1 p/12 + 1/3 = 1 (p + 4)/12 = 1 p + 4 = 12 p = 8

12. The probability of guessing the corec f 2t:1suer tw a certain test is 2 Ifthe prohatbliyof not guessing the correct answer to this question is . then lind the valure of12. The probability of guessing the cornectis certai:i test is 1Ifthe probability3301

Answer»

E be the event of guessing correct so

E' is event of of incorrect .

We know,

P(E) + P(E') = 1

p/12 + 1/3 = 1

(p + 4)/12 = 1

p + 4 = 12

p = 8