We need to find the probability of the card chosen at random is yellow or brown.
So, since there are 3 yellow cards and 7 brown cards, the total numbers of cards that are yellow or brown is:

Now, the probability that the chosen card is yellow or brown can be found by dividing the above value by the total number of cards in the box.
The total number of cards in the box is:

Thus, that probability is given by:

Therefore, the answer is:
Answer:
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Step-by-step explanation:
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Finding the equivalent multiplier, it is found that the function for the final price is:
P(x) = 0.68x.
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- There is a holiday sale of 20% off the price of x, thus 0.8x is paid, as 1 - 0.2 = 0.8.
- Additionally, there is a coupon of 15% off, thus, 0.85 of 0.8x is paid.
- The equivalent multiplier is:

- Thus, the function for the final price is:

A similar problem is given at brainly.com/question/16999193
1.2 inches of snow fell per hour, 7.2/4=1.2