Question

Школьная практическая конференция проводится в 5 дней. всего запланировано 64 доклада- первые 2 дня до 20 докладов, остальные распределены поровну между третьими, четвертыми и пятым днями. порядок докладов определяется жеребьевкой. какова вероятность, что доклад Владимира С. окажется запланированным в последний день конференции?

Answer 1

64-20*2=4 (за 2 дня)
4/3 (оставшиеся 3 дня)
4/3 разделить на 64= 256/3

Ответ: 256/3

Answer 2

Probability of Vladimir S.'s Presentation on the Last Day of the Conference

To calculate the probability of Vladimir S.'s presentation being scheduled on the last day of the conference, we need to consider the total number of presentations and the distribution of presentations across the different days.

According to the information provided, there are a total of 64 presentations planned for the conference. The first two days will have 20 presentations, and the remaining presentations will be evenly distributed among the third, fourth, and fifth days.

Let's break down the calculation step by step:

1. Calculate the number of presentations on the third, fourth, and fifth days: - The first two days have a total of 20 presentations. - Therefore, the remaining days (third, fourth, and fifth) will have 64 - 20 = 44 presentations in total. - Since these presentations are evenly distributed, each day will have 44 / 3 = 14.67 presentations. However, since we cannot have a fraction of a presentation, we need to round this number to the nearest whole number. - Therefore, each of the third, fourth, and fifth days will have 15 presentations.

2. Calculate the probability of Vladimir S.'s presentation being scheduled on the last day: - Since the order of presentations is determined by a lottery, each presentation has an equal chance of being scheduled on any given day. - Since there are 64 presentations in total, the probability of Vladimir S.'s presentation being scheduled on the last day is 1 out of 64.

Therefore, the probability of Vladimir S.'s presentation being scheduled on the last day of the conference is 1/64.

Please note that the information provided does not specify whether Vladimir S.'s presentation is one of the first 20 presentations or one of the remaining 44 presentations. If more specific information is available, the calculation can be adjusted accordingly.