
Help pleeez
a techno startup company employs 220 people in total. The company has 5% of staff in HR, a sales and marketing staff which is 30% of the head count and the remainder in R&D. The R&D consists of chemists and biologists. The number of biologists are 21 more than the number of chemists.
What is the number of biologists in the company?
Due to a new round of venture capital funding the company increases the total head count by 50%. The R&D now represents 80% of the head count and there was no change in the HR staff. What percentage of the company is the sales and marketing?
One year later the company decides to have a head count reduction of 30%. R&D and sales and marketing department were affected by the reuction. R&D lost 61 people more than sales and marketing. After the reduction what percentage of employees are in the R&D?

0.05*220=HR
0.3*220=S&M
(10.30.05)*220=R&D
Solve for R&D
R&D=2*BIO21
Solve for BIO
Next part
New HC= Old HC*1.5
etc.

a techno startup company employs 220 people in total. The company has 5% of staff in HR, a sales and marketing staff which is 30% of the head count and the remainder in R&D. The R&D consists of chemists and biologists. The number of biologists are 21 more than the number of chemists.
Total employees = 220
HR = 5% of 220 = (0.05)(220) = 11
S&M = 30% of 220 = (0.30)(220) = 66
R&D = 220 (11 +66) = 220 77 = 143
Chem +Bio = 143 (1)
Bio = Chem +21 (2)
What is the number of biologists in the company?
Substitute (2) into (1),
Chem +(Chem +21) = 143
2Chem = 143 21 = 122
Chem = 122/2 = 61
Hence,
Bio = 143 61 = 82 answer.

Due to a new round of venture capital funding the company increases the total head count by 50%. The R&D now represents 80% of the head count and there was no change in the HR staff. What percentage of the company is the sales and marketing?
New total employees = 220 plus 50% of 220 = (1.50)(220) = 330
R&D = 80% of 330 = (0.80)(330) = 264
HR = still 11
S&M = ?
S&M = 330 (264 +11) = 330 275 = 55
55/330 = 0.16667 = 16.67% or, say, 17%
That means S&M are 17% of the employees answer.

One year later the company decides to have a head count reduction of 30%. R&D and sales and marketing department were affected by the reuction. R&D lost 61 people more than sales and marketing. After the reduction what percentage of employees are in the R&D?
Total reduction = 30% 0f 330 = (0.30)(330) = 99
R&D and S&M lost 99 altogether (3)
R&D lost (S&M +61) (4)
So, substitute (4) into (3),
(S&M +61) +S&M lost 99
2S&M lost 99 61 = 38
S&M lost (38/2) = 19
Hence, R&D lost (19 +61) = 80
After reduction:
Newer total employees = 330 99 = 231
R&D = 264 80 = 184
184/231 = 0.7965 = 79.65% or, say, 80%
That means R&D still has 80% of the employees. answer.