A bag contains 5 white and 4 red balls. A ball is drawn at random from the bag. What is the probability that the ball drawn is not red ?
\(\dfrac{5}{9}\)
The bag contains 5 white balls and 4 red balls, so the total number of balls is 5 + 4 = 9.
The balls that are not red are the white balls, and their number is 5.
The probability of an event is the number of favourable outcomes divided by the total number of possible outcomes.
So, the probability that the ball drawn is not red is \(\dfrac{5}{9}\).
Hence, the probability that the ball drawn is not red is \(\dfrac{5}{9}\).
The mean of the observations 48, 42, \(x+17\), \(x+15\), \(x+20\), 60 and 58 is 53. Then, the median of these observations is:
Numbers 12, 13, 14, ..., 101, 102 and 103 are written on slips (one number on one slip) and put in a box. A slip is then taken out from the box at random. What is the probability that the selected slip bears a number divisible by 7?
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Find the mode and median of 3, 4, 5, 5, 3, 6, 7, 3, 5, 5, 6.
A. 5 and 5
B. 3 and 5
C. 5 and 4
D. 3 and 4
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