Suppose a deli sells morning newspapers at an average of 10 per hour with a standard deviation of 5. use the standard normal distribution.

a. what is the probability that the deli will sell up to 7 newspapers in a given hour?
b. what is the probability that the deli will sell 12 or more newspapers in a given hour?

a) 0.274 is the probability that the deli will sell up to 7 newspapers in a given hour.

b) 0.345 is the  probability that the deli will sell 12 or more newspapers in a given hour.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 10 per hour

Standard Deviation, σ = 5 per hour

Formula:

a) P(deli will sell up to 7 newspapers in a given hour)

P(x < 7)

Calculation the value from standard normal z table, we have,  

0.274 is the probability that the deli will sell up to 7 newspapers in a given hour.

b) P( deli will sell 12 or more newspapers in a given hour)

P(x > 12)

Calculation the value from standard normal z table, we have,  

0.345 is the  probability that the deli will sell 12 or more newspapers in a given hour.

∠lno ≅ ∠lnm

∠oln ≅ ∠mln

step-by-step explanation:

given   that triangle lno is congruent to triangle lnm.

we have to fill up the blanks in the given question.

according to above order of congruency   kept in mind we can say that

∠lno ≅ ∠lnm

∠oln ≅ ∠mln

ln ≅ ln due to common in both.

hence, by sas congruency,

the side angle side rule   states that if two sides and the included angle of one triangle are congruent to another triangle, then these two triangles are congruent.