Acupboard contains 20 boxes of chalks which are red and blue in colour. a box of chalks is chosen at random from the cupboard. if the probability of choosing a box of blue chalks is 1/4 ,calculate 1)the number of boxes of red chalks in the cupboard2) the number of boxes of blue chalks that should be put into the cupboard so that the probability of choosing a box of blue chalks is 2/5

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

Twelve less than a number is at most 20

Ascientist studied a population of workers to determine whether verbal praise and/or tangible rewards affect employee productivity. in the study, some workers were offered verbal praise, some were offered tangible rewards (gift cards, presents, and some were offered neither. the productivity of each participant was measured throughout the study by recording the number of daily tasks completed by each employee. which inference might the scientists make based on the given information? a.) the number of daily tasks completed by each employee may influence the dependent variable, which is whether the employee receives verbal praise, tangible rewards, or neither. b.) verbal praise and/or tangible rewards may influence the independent variable, which is the number of daily tasks completed by each employee. c.) verbal praise and/or tangible rewards may influence the dependent variable, which is the number of daily tasks completed by each employee. d.) the dependent variables, which are verbal praise and tangible rewards, may influence the number of daily tasks completed by each employee.