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When you were four years old your sister was half your age Now you are 100 What is her age?
When you were 4 she was 2. You were two years older than she was. So if you are now 100 she is 98
A boy is ten years old and has a mental age of ten years what would be his IQ?
If the boy's chronological age and mental age are equal, his IQ would be assumed to be 100. (Using chronological age x IQ/100 as the template).
When you were 4 years old your sister was half your age Now am 100 years How old is your sister?
If you mean "now you are 100 years old", then, my sister is now 98 years old, since she was 2 when I was 4.
Assume that life expectancy in the us is normally distributed with a mean of 73 years and a standard deviation of 9 years what is the probability that you will live to be over 100 years old?
You would have about 1/2 of 1 % chance of living to 100 since age 100 is three standard deviations (SD) from the mean. If you are with in three SD of the mean you have 99% of the data set or probablity contained. Hence, you would be missing 1% of which half would be above age 100 and half would be below (73-27) age 46.
When you were 2 years old your sister was Half of your age now you are 100 years old how old is your sister?
If when you were 2 years old your sister was half of your age, you would have been 2 and she would have been 1. So she is one year younger than you. Thus now you are 100 she will be one year younger and aged 99.
