You need to find the width of the stream. You cannot measure the width directly, so you draw a diagram showing lengths that you
can measure. Your diagram contains two similar triangles, one in the stream and one on land. Use the diagram to find the width of the stream.
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Answer:
<h2>There is a 9% of chances that all three selections are apples.</h2>Step-by-step explanation:
We know that there are 6 apples, 5 oranges and 1 pear, which gives a total of 12 fruits, that's total number of possible outcomes, the denominator of the simple probability.
Now, his friend selects three fruits with three trials without replacement, that means we need to find the probability of each even and then multiply them, because they are independent events.
Notice that we calculated the total probability using the same expression. The important thing is that you need to decrease the number of events and the total number of outcomes at each selection, because after his friends picks one apple, he doesn't put it back in the bag.
Therefore, there is a 9% of chances that all three selections are apples.
(We multiplies the number by 100 to express it in percentage)