8. in many courts, 12 jurors are chosen from a pool of 30 perspective jurors.
a. in how many ways can 12 jurors be chosen from the pool of 30 perspective jurors?
b. once the 12 jurors are selected, 2 alternates are selected. the order of the alternates is specified. if a selected juror cannot complete the trial, the first alternate is called on to fill
that jury spot. in how many ways can the 2 alternates be chosen after the 12 jury members have been chosen?

The number of ways to select 12 jurors are 86493225.

The number of ways to select 2 alternates are 306.

Step-by-step explanation:

Consider the provided information.

In many courts, 12 jurors are chosen from a pool of 30 perspective jurors.

Part (A):  In how many ways can 12 jurors be chosen from the pool of 30 perspective jurors?

Since order doesn't matter so we will use combination.

Use the formula for combination

Substitute n=30 and r=12 in above formula.

Hence, the number of ways to select 12 jurors are 86493225.

Part (B) Once the 12 jurors are selected, 2 alternates are selected. The order of the alternates is specified. If a selected juror cannot complete the trial, the first alternate is called on to fill  that jury spot. In how many ways can the 2 alternates be chosen after the 12 jury members have been chosen?

Here 12 jury members have been chosen, so 30-12=18 perspective jurors are left.

From 18 perspective jurors we need to select 2 alternates.

Since the order of the alternates matter so we will use permutation:

The formula for permutation is:  

Substitute n=18 and r=2 in above formula.

Hence, the number of ways to select 2 alternates are 306.

£56

step-by-step explanation:

u divide 24 by 3 and u get 8 so if u do 8 time 7 or 8+8+8+8+8+8+8 u get 56 and 56 divided by 7 is 8.