Identify the expression which represents the calculation subtract 3 from 15 then divided by 6

What is the probability of drawing three queens from a standard deck of cards, given that the first card drawn was a queen? assume that the cards are not replaced.

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth