It rained nine days in the month of April. Based on this, what is the probability that it does not rain on the first day of May? *

0.7

Step-by-step explanation:

April has 30 days, and we know that it rained in 9 of them.

Then the probability that there will be rain in a random day, can be estimated as the quotient between the number of days where was rain and the total number of days, this probability will be:

P = 9/30 = 0.3

And we can extrapolate this probability to May.

Then we can estimate that the first day of May, the probability of rain will be around 0.3

Then the probability that it does not rain in the first day of may will be:

1 - 0.3 = 0.7

well there are two answers for that.

1: you need 120 ones then that will equal up to 120.

2: you could also do one 100 and 2 tens.

those are the answers that i have thought of.

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,