Question

У ба­буш­ки 20 чашек: 5 с крас­ны­ми цветами, осталь­ные с синими. Ба­буш­ка на­ли­ва­ет чай в слу­чай­но вы­бран­ную чашку. Най­ди­те ве­ро­ят­ность того, что это будет чашка с си­ни­ми цветами.

Answer 1

20-5 = 15 чашек с синими цветами
15/20 = 0,75

Answer 2

Probability of selecting a cup with blue flowers

To find the probability of selecting a cup with blue flowers, we need to determine the total number of cups and the number of cups with blue flowers.

According to the information provided, the grandmother has 20 cups, with 5 cups having red flowers and the rest having blue flowers

Therefore, the number of cups with blue flowers is 20 - 5 = 15.

The probability of selecting a cup with blue flowers can be calculated by dividing the number of cups with blue flowers by the total number of cups:

Probability = Number of cups with blue flowers / Total number of cups

Probability = 15 / 20

Simplifying the fraction, we get:

Probability = 3 / 4

So, the probability of selecting a cup with blue flowers is 3/4 or 0.75.

Please let me know if there's anything else I can help you with!