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if a toaster ovens hav an average life expectancy of 9.5 years with a standard deviation of 4.75 years. what is the probability that a toaster oven will last twenty years or will fail in one year or less?

if anxiety scores were recorded as Z score or 1.10, is that higher than 35 in the current study?

The sum of 8th term of an A.P is 60 while the sum of 50th term is 880. Find the 43rd term