According to a survey, 67% of murders committed last year were cleared by arrest or exceptional means. fifty murders committed last year are randomly selected, and the number cleared by arrest or exceptional means is recorded.
a) find the probability that exactly 41 murders were cleared.
b)the probability that between 36 and 38 of the murders, inclusive were cleared is?
c) would it be unusual if fewer than 20 of the murders were cleared? why or why not?
it was 5/16 of a page long.
that would be 1 1/4 - 1 1/4 * 3/4
= 5/4 - 5/4 * 3/4
= 5/4 - 15/16
= 20/16 - 15/16
= 5/16 (answer).
291.87 is a rational number.
rational numbers are those numbers that can be expressed in fractions that is can be written as where p and q are integers and .
consider the given number 291.87
rewrite the decimal number as a fraction with 1 in the denominator, we get,
multiply to remove 2 decimal places. here, you multiply top and bottom by 10² = 100
thus, the above fraction can be written as,
thus, 291.87 is a rational number.
scalene and right
since there is a 90 degree angle within the triangle, the triangle can be classified as right (as 90 degrees equals a right angle).
the triangle is also scalene since all sides and angles are different, and are essentially not congruent.