Multiply the mantissas: 4.2 x 3.7 = 15.54, add the exponents 5+6= 11 so 15.54 x 10^11, BUT WAIT, there can only be one digit in from to the decimal, so 1.554 x 10^12 (add 11 + 1 decimal place change, so 12)
X = -1/10
2=10x+3
10x+3=2
10x = 2 - 3
10x = -1
x = - 1/10
Answer:
there is only 1 probability of getting all questions right.