Sum of squares of differences in ranks-25.5, n=10, an item 20 is repeated 4 times and another item 22 is repeated 3 times in case of X series and 24 is repeated 2 times in case of y series, coefficient of rank correlation is a) 0.70 b) 0.80 c) 0.85 d) none

Dbecause there are negatives surrounding ding it

Answer: the correct answer is 10step-by-step explanation: let the number be n, then the expression becomes,then“twelve more than the quotient of a number and two, decreased by four” iswhen n=4,we substitute 4 whetever we see n to get,we simplify to obtain,we further simplify to get,therefore the correct answer is c.

Sorry i meant b in the other question

5 cm

step-by-step explanation:

the triangles are similar. therefore the corresponding sides are in proportion:

              cross multiply

            divide both sides by 32