A bag contains 4 red balls and 5 white balls of same size. Two balls are drawn randomly one after another (without
replacement). Find the probability that both balls are red
by drawing a tree diagram.
Ans:​

Type the correct answer in each box. use numerals instead of words. if necessary, use / for the fraction bar(s). line m has no y-intercept, and its x-intercept is (3, 0). line n has no x-intercept, and its y-intercept is (0, -4). the equation of line m is , and the equation of line n is .