Question

В парке сажали деревья два года: в 2005 г. - 71 и в 2006 г. - 49. Какова вероятность того, что произвольно выбранное дерево посажено в 2005 году? Ответ указать с точностью 0,01

Answer 1

71+49=120
71÷120=≈0,591

Answer 2

Probability of randomly selecting a tree planted in 2005

To calculate the probability of randomly selecting a tree planted in 2005, we need to know the total number of trees planted in both 2005 and 2006. From the given information, we know that 71 trees were planted in 2005 and 49 trees were planted in 2006.

The probability of selecting a tree planted in 2005 can be calculated by dividing the number of trees planted in 2005 by the total number of trees planted in both years.

Let's calculate the probability:

Total number of trees planted = 71 (in 2005) + 49 (in 2006) = 120

Probability of selecting a tree planted in 2005 = Number of trees planted in 2005 / Total number of trees planted

Probability = 71 / 120

Probability = 0.5917 (rounded to four decimal places)

Therefore, the probability of randomly selecting a tree planted in 2005 is approximately 0.5917 with a precision of 0.01.

Please note that the search results did not provide specific information about the number of trees planted in the given years. Therefore, the calculation assumes that the numbers provided in the question are accurate.