gọi ngẫu nhiên một xạ thủ ra bắn 2 viên đạn. xác suất trúng đích mỗi viên của mỗi xạ thủ lần lượt là 0,8; 0,9; và 0,6. biết đích không bị bắn trúng là do xạ thủ thứ ba bắn.

Type the correct answer in each box. use numerals instead of words. if necessary, use / for the fraction bar. consider the given table.

What are two numbers that add up to -9 and multiply to -10 best answer gets branliest and 100 extra points

The weibull distribution is widely used in statistical problems relating to aging of solid insulating materials subjected to aging and stress. use this distribution as a model for time (in hours) to failure of solid insulating specimens subjected to ac voltage. the values of the parameters depend on the voltage and temperature; suppose α = 2.5 and β = 190. (a) what is the probability that a specimen's lifetime is at most 250? less than 250? more than 300? (round your answers to four decimal places.) at most 250 less than 250 more than 300 (b) what is the probability that a specimen's lifetime is between 100 and 250? (round your answer to four decimal places.) (c) what value is such that exactly 50% of all specimens have lifetimes exceeding that value? (round your answer to three decimal places.) hr