Premium Online Home Tutors
3 Tutor System
Starting just at 265/hour
Answer :
Total number of marbles in the box = 5 (Red) + 8 (White) + 4 (Green) = 17
\(\therefore \) Total number of elementary events = 17
(i) There are 5 red marbles in the box
\(\therefore \) Favourable number of elementary events = 5
Hence, P (getting a red marble) \( = \ \frac{5}{17} \)
(ii) There are 8 white marbles in the box.
\(\therefore \) Favourable number of elementary events = 8
Hence, P (getting a white marble) \( = \ \frac{8}{17} \)
(iii) There are 5 + 8 = 13 marbles which are not green in the box.
\(\therefore \) Favourable number of elementary events = 13
Hence, P (not getting a green marble) \( = \ \frac{13}{17} \)