To solve the problem, we need to find the probability of not getting a red marble when a marble is drawn at random from a box containing 7 red marbles and 9 green marbles.
1. Total Number of Marbles:
The total number of marbles = 7 (red) + 9 (green) = 16 marbles
2. Favourable Outcomes:
The favourable outcome for the event "not getting a red marble" is drawing a green marble.
Number of green marbles = 9
3. Probability Formula:
Probability = \( \frac{\text{Number of favourable outcomes}}{\text{Total number of outcomes}} \)
So, Probability = \( \frac{9}{16} \)
Final Answer:
The probability of not getting a red marble is \( \frac{9}{16} \)
A shop selling electronic items sells smartphones of only three reputed companies A, B, and C because chances of their manufacturing a defective smartphone are only 5%, 4%, and 2% respectively. In his inventory, he has 25% smartphones from company A, 35% smartphones from company B, and 40% smartphones from company C.
A person buys a smartphone from this shop
A shop selling electronic items sells smartphones of only three reputed companies A, B, and C because chances of their manufacturing a defective smartphone are only 5%, 4%, and 2% respectively. In his inventory, he has 25% smartphones from company A, 35% smartphones from company B, and 40% smartphones from company C.
A person buys a smartphone from this shop
(i) Find the probability that it was defective.