7. A box contains 15 components. This box was dropped in transit and five components became defective, but not visibly. a) If 2 components are selected at random without replacement from the box, what is the probability that i) both are good 10 ii) only one is good? b) If the components are taken at random from the box and tested until a good one is obtained, what is the probability that the first good component obtained is the i) 2nd component tested, ii) 3rd component tested?
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
![3. In Pleuville, whether it will rain on any day is independent of whether it rains on any other day.
The probability that it will rain on any day is 0.6. Calculate the probability that next week it will rain on
Monday, not rain on Tuesday and rain on Wednesday.
[2]
200)
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