Question

У коробці було 19 карток пронумерованих числами від 1 до 19. Ізкоробки навмання взяли одну картку. Яка ймовірність того що на ній записано число: 1)12 2)парне 3)кратне 3 4)у записі якого є цифра 1

Answer 1

Ответ:

Пошаговое объяснение:

вероятность = количество благоприятных исходов ÷ на количество всех исходов.

1)число 12 одно, значить 1÷19=1/19

2)четных чисел 2 4 6 8 10 12 14 16 18

всего 9, 9/19

3) 3 6 9 12 15 18 чисел 6

вероят. 6/19

4) сцифрой 1 : 1 10 11 12 13 14 15 16 17

18 19 чисел 11

вероятность 11/19=0,5789

Answer 2

Probability of Drawing a Numbered Card from a Box

To calculate the probability of drawing a specific type of numbered card from a box containing 19 sequentially numbered cards, we can consider the following scenarios:

1. Probability of Drawing Card Number 12: - The probability of drawing card number 12 from the box can be calculated by dividing the number of favorable outcomes (drawing card 12) by the total number of possible outcomes (drawing any card from 1 to 19).

The probability of drawing card number 12 is therefore 1/19, as there is only one card numbered 12 out of 19 cards in total.

2. Probability of Drawing a Even Numbered Card: - To calculate the probability of drawing an even-numbered card, we need to determine the number of even-numbered cards in the box and divide it by the total number of cards.

There are 9 even-numbered cards (2, 4, 6, 8, 10, 12, 14, 16, 18) out of 19 cards in total. Therefore, the probability of drawing an even-numbered card is 9/19.

3. Probability of Drawing a Multiple of 3: - The probability of drawing a card with a number that is a multiple of 3 can be calculated by determining the number of cards in the box that are multiples of 3 and dividing it by the total number of cards.

There are 6 cards (3, 6, 9, 12, 15, 18) in the box that are multiples of 3. Therefore, the probability of drawing a card that is a multiple of 3 is 6/19.

4. Probability of Drawing a Card with the Digit 1: - To calculate the probability of drawing a card with the digit 1 in its number, we need to determine the number of cards in the box that have the digit 1 in their number and divide it by the total number of cards.

There are 2 cards (1, 10) in the box that have the digit 1 in their number. Therefore, the probability of drawing a card with the digit 1 in its number is 2/19.

In summary, the probabilities are as follows: - Drawing card number 12: 1/19 - Drawing an even-numbered card: 9/19 - Drawing a multiple of 3: 6/19 - Drawing a card with the digit 1: 2/19