b. 0.97725 c. 0.78447 2. How much should be the montly amount for groceries to ensure that the probability that this budget will not be be exceeded is 0.1 (write the letter of the right answer (a,b,c)) a. 271.8 b. 578.669 c. 528.155 3. Find the probability that the amount spent for goceries varies between 300 and 500 (write the letter of the right answer (a,b,c)) a. 0.88232 b. 0.68269 c. 0.67123 4. The standard normal distribution can be used to find the probabilities associated with this normal random variable. Indicates which is the standardising equation for this (write the letter of the right answer (a,b,c) x-H a. z= - X - H b. z= n C. X =/+20 Moving to another question will save this response. >