SSC CGL TIER- I & II » Maths » Average

 A The average marks  of 32 boys of section A of class X is 60 whereas the average marks of 40 boys of section B of class X is 33. The average marks for both the sections combined together is :

d{kk 10 ds [k.M A ds 32 dk Nk=kas dk vkSlr 60 rFkk [k.M B ds 40 Nk=ksas dk vkSlr 33 gSA d{kkvksa dk vkSlr Kkr djksa

A.  

44         

B.  

45

C.  

46 1/2 

D.  

45 1/2

Answer: Option A

A fruit seller sold big , medium and small sized apples for Rs. 15, Rs. 10, and Rs. 5, respectively . The total the ratio 3 : 2 : 5. Find the average cost of an apple.

,d Qy foØsrk us cMs+ e/; rFkk NkssVs vkdkj ds lsc : 15 , : 10 rFkk : 5 ds Hkko ls cspsaA dqy lsc 3 : 2 : 5 ds vuqikr esa csps x;sA lsc dk vkSlr ewY; Kkr djsa ?

A.  

8                    

B.  

10

C.  

9       

D.  

7

Answer: Option A

  The average  of marks scored by the students of a class is 68. The average of marks of the girls in the class is 80 and that of boys is 60. What is the percentage of boys in the class ?

fdlh d{kk ds fo|kfFkZ;ksa dk vkSlr 68 gSA Nk=kvksa dk vkSlr 80 rFkk Nk=ksa dk vkSlr 60 gSA d{kk esa Nk=ksa dk izfr'kr Kkr djs 

A.  

40%                

B.  

60%

C.  

65%

D.  

70% 

Answer: Option A

There are 50 student in a class. Their average weight is 45 kg. When one student leaves  the class the average weight reduces by 100 gm. What is the weight of the student who left the class?

fdlh d{kk esa 50 fo|kFkhZ gSaA mudk vkSlr otu 45 kg gS tc ,d fo|kFkhZ d{kk ls pyk tkrk gS] vkSlr otu 100 gm de gks tkrk gSaA ml fo|kFkhZ dk otu Kkr djsa] tks d{kk ls pyk tkrk gS

A.  

45 kg             

B.  

47.9 kg

C.  

49.9 kg           

D.  

50.1 kg

Answer: Option A

The average weight of the 8 oarsmen in boat is increased by 1 1/2  kg when one off the crew whoes weights 60 kg is replaced by a new man. The weights of the new man (in kg) is :

8 tgkt - dehZ dk vkSlr otu 1 1/2 kg c<+ tkrk gS] tc ,d tgkt - dehZ ftldk otu 60 kg gS dks ,d u;k O;fDRk izfrLFkkfir djrk gSA u;s O;fDr dk otu Kkr djsa ?

A.  

70 kg        

B.  

68 kg

C.  

71 kg          

D.  

72 kg

Answer: Option A

The average weight of 12 crewmen in a boat is increased by 1/3  kg when one off the crewmen whose weight is 55 kg is replaced by a new man . what is the weight of that new man ?

12 ukfodksa dk vkSlr otu  1/3 kg c<+ tkrk gS] tc 1 ukfod ftldk otu 55 kg gS dks vU; O;fDr izfrLFkkfir djrk gSA u;s O;fDr dk otu Kkr djsa \

A.  

 58 kg            

 

B.  

60 kg

C.  

57 kg           

D.  

59 kg

Answer: Option A

The average weight of 20 student in a class in increased by 0.75 kg when one student is 35 kg replaced by a new student weight of the new student (in kg) is :

20 fo|kfFkZ;ksa dk vkSlr otu 0.75 kg c< tkrk gS] tc ,d fo|kFkhZ }kjk ftldk otu 35 kg gS] dks ,d vU; fo|kFkhZ )kjk izfrLFkkfir fd;k tkrk gSA u;s fo|kFkhZ dk otu Kkr djs :

A.  

35   

B.  

40

C.  

45   

D.  

50

Answer: Option A

The average age of 8 men is increased by 2 years when two of them whose age are 21 and 23 years replaced by two men. The average age of the two new men is

8 O;fDr;ksa dh vkSlr vk;q 2 o"kZ c<+ tkrh gS] ;fn muesa ls nks O;fDr;ksa ftudh vk;q 21 o"kZ rFkk 23 o"kZ gS] dks nks u;s O;fDr;ksaa ls izfrLFkkfir fd;k tkrk gSaA nks u;s O;fDr;ksa dk vkSlr Kkr djsa :

A.  

22 years     

B.  

24 years

C.  

28 years       

D.  

30 years

Answer: Option A

The  average weight of 12 parcels is 1.8 kg. Addition of another new parcel reduces of the average weight by 50 gm what is the weight of the new parcel   ?

12 caMyksa dk vkSlr otu 1.8 kg gSaA ,d u;s caMy ds lEefyr gksus ds dkj.k ] vkSlr otu 50  gm der gks tkrk gSA u;sa caMy dk otu Kkr djsa ?

A.  

1.5 kg             

B.  

1.10 kg

C.  

1.15 kg         

D.  

 1.01 kg

Answer: Option A

If the average weight of six students is 50 kg, If two student of average age of 51 kg. added and other students of average age of 55 kg also added then the average weight of all students is:

6 fo|kfFkZ;ksa dk vkSlr otu 50kg 2 fo|kfFkZ;ksa dk vkSlr otu 51kg rFkk 2 vkSj 'kkfey gks tkrs gSaA rc lHkh fo|kfFkZ;ksa dk vkSlr otu Kkr djsa\

A.  

61 kg         

B.  

51.5 k

C.  

52 kg      

D.  

 51.2 kg

Answer: Option A