Question 1
On a street with `7` houses, `2` houses are blue. If a house from this street is selected at random, what is the probability of selecting a house that is blue?
A) `1/7`
B) `2/7`
C) `5/7`
D) `7/7`
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Question 2
| Red | Blue | Yellow | Total | |
| Square | `10` | `20` | `25` | `55` |
| Pentagon | `20` | `10` | `15` | `45` |
| Total | `30` | `30` | `40` | `100` |
The table summarizes the distribution of color and shape for `100` tiles of equal area.
If one of these tiles is selected at random, what is the probability of selecting a red tile? (Express your answer as a decimal or fraction, not as a percent.)
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Question 1
On a street with `7` houses, `2` houses are blue. If a house from this street is selected at random, what is the probability of selecting a house that is blue?
A) `1/7`
B) `2/7`
C) `5/7`
D) `7/7`
Answer: B
The probability of an event is the ratio of the number of favorable outcomes to the total number of possible outcomes. In this case, there are `2` blue houses (favorable outcomes) and a total of `7` houses. Therefore, the probability is `2/7`.
Question 2
| Red | Blue | Yellow | Total | |
| Square | `10` | `20` | `25` | `55` |
| Pentagon | `20` | `10` | `15` | `45` |
| Total | `30` | `30` | `40` | `100` |
The table summarizes the distribution of color and shape for `100` tiles of equal area.
If one of these tiles is selected at random, what is the probability of selecting a red tile? (Express your answer as a decimal or fraction, not as a percent.)
Answer: `3/10` or `0.3`
It is given that there are a total of `100` tiles of equal area, which is the total number of possible outcomes. According to the table, there are a total of `30` red tiles. The probability of an event occurring is the ratio of the number of favorable outcomes to the total number of possible outcomes. Thus, the probability of selecting a red tile is given by `30/100 = 3/10`, or `0.3`.
Question 1
On a street with `7` houses, `2` houses are blue. If a house from this street is selected at random, what is the probability of selecting a house that is blue?
A) `1/7`
B) `2/7`
C) `5/7`
D) `7/7`
Question 2
| Red | Blue | Yellow | Total | |
| Square | `10` | `20` | `25` | `55` |
| Pentagon | `20` | `10` | `15` | `45` |
| Total | `30` | `30` | `40` | `100` |
The table summarizes the distribution of color and shape for `100` tiles of equal area.
If one of these tiles is selected at random, what is the probability of selecting a red tile? (Express your answer as a decimal or fraction, not as a percent.)
