A.20

B.30

C.50

D.100

**Show Answer**

**Answer=Option C**

A.20

B.30

C.50

D.100

**Show Answer**

A.1

B.-1

C.9

D.10

E.3

**Show Answer**

A.4

B.5

C.6

D.40

E.44

**Show Answer**

A.6

B.7

C.10

D.15

E.30

**Show Answer**

A.c+fd

B.cd

C.c+f(d-7)

D.7c+f(d-7)

E.cd+f

**Show Answer**

A.80

B.85

C.90

D.5

E.100

**Show Answer**

A.3

B.8

C.9

D.12

E.6

**Show Answer**

A.1000

B.1200

C.1500

D.2000

E.3000

**Show Answer**