It has been reported that 48% of teenagers play video games on their phones. a random sample of 60 teenages is drawn. find the probability that the proportion of teenagers in the sample who play videos games on their phone is less than 0.489 .

Pls , the question is in the picture!

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

Hiroaki wants to find 3 3/4 - 7/8 explain why he must rename 3 3/4 to do the subtraction.