Each person, in an it department of 60 people, works on at least one of 3 major projects: system security, program implementation, platform development. 23 people work on system security, 28 work on program implementation, and 26 work on platform development. 7 people work on system security and platform development, 12 people work on program implementation and platform development, and 6 people work on all three projects. how many people work only on system security and program implementation (i. e., not all three projects)?
answer either: 4, 5 or 6

4

Step-by-step explanation:

Given: total persons in IT department=60,23 people work on system security, 28 work on program implementation, and 26 work on platform development. 7 people work on system security and platform development, 12 people work on program implementation and platform development, and 6 people work on all three projects.

To Find: number of people working only on system security and program implementation.

Solution:

let people in system security be=,

let people in  program implementation be=,  

let people in platform development be=,

persons working in and = ∩, ∩=

persons working in and = ∩, ∩=

persons working in and = ∩=

persons working in , and =∩∩, ∩∩=6

Now,

we know that

∪∪= ++-∩-∩-∩+∩∩

on putting values,

60=23+28+26-7-12-∩+6

∩=64-60

∩=4

hence, the number of persons working in system security and program implementation are=4

you are uyytr tyy

step-by-step explanation:

change of stock price/initial stock price on friday * total stock value = change of stock value

0.89/73.73 *x = 42.72

x=3539.04 = total stock value at initial stock price on friday .

total stock value at initial stock price on friday/ initial stock price on friday = number of shares

3539.04/73.73 = 48 shares

they own 48 shares of this stock