A combination lock consists of 3 numbers between 1 and 9 and digits may be repeated. In the first blank, enter the total number of possible combinations. In the second blank, enter the probability of guessing the combination if you know that it starts with a 3. Enter your answer as a percent rounded to one decimal place. Do not enter the % symbol Blank # 1 A/ Blank # 2You have a 5 by 4 grid. Start End How many ways could you travel through from the north west corner (Start) to the south east corner (End) if you could only travel south and east.Which of the following represent the number of ways 7 objects could be selected from 20 if order matters. Check all that apply. 20 x 19 x 18 x 17 x 16 x 15 x 14 20! 7! 13 x 12 x 11 x 10 x 9x 8x7 20! 13! 20 P7 20 C7