context: ###List of Questions
  (1) Calculate prob of picking 1 j and 1 a when two letters picked without replacement from {a: 10, j: 2, b: 2}.
  (2) How many decades are there in 356318.7 months?
  (3) (-3 - 2) + -1 + 0 + 1
  (4) Solve -31*c + 50 = 236 for c.
  (5) Suppose -27 = g - 70. What is the units digit of g?
q_1: (1) Calculate prob of picking 1 j and 1 a when two letters picked without replacement from {a: 10, j: 2, b: 2}.
q_2: (2) How many decades are there in 356318.7 months?
q_3: (3) (-3 - 2) + -1 + 0 + 1
q_4: (4) Solve -31*c + 50 = 236 for c.
q_5: (5) Suppose -27 = g - 70. What is the units digit of g?