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Ten books are arranged in a row following a certain sequence. Among them 3 are History , 3 are Economics, 2 are Maths and 2 are English. From the left, there is an English book between a History and Maths book, a history book between a Maths and an English book, an Economics book between an English and a Maths Book. a Maths book between two Economics books and two Economics two Economics book between a Maths and a History book. Book of which subject is at the sixth position from the left?
A English
B Economics
C History
D Mathematics
Ten bools are arranged in a row following a certain sequence.Among them 3 History,3 are Economics, 2 are Math's and are English.From the left,There is English book between a History and Math's book, a History book between a Math's and an English book, an Economics book between an English and a Math's Book Math's book between two Economics books and two Economics book between Math's and a History book.Book of which subject is at the sixth position from the left?
A Economics
B English
C History
D Mathematics
There are 87 balls in a jar. Each ball is painted with at least one of two colors, red or green. It is observed that 2/7 of the balls that have red color also have green color, while 3/7 of the balls that have green color also have red color. what fraction of the balls in the jar has both red and green colors?
A 6/14
B 2/7
C 6/35
D 6/29
তড়িৎ রাসায়নিক কোষের emf = ?i.E0Anodee(ox)+E0cathode(Red)ii.E0cathode(Red)-E0Anodee(Red)iii.E0Anodee(ox)-E0cathode(Red)কোনটি সঠিক?
A i ও ii
B i ও iii
C ii ও iii
D i, ii ও iii
তড়িৎ রাসায়নিক কোষের emf = ?i. E° Anode(ox) + E°Cathode (Red) 11. E Cathode(Red) - E°Anode (Red) 111. E° Anode(ox) - E°Cathode (Red) নিচের কোনটি সঠিক?
A i ও ii
B i ও iii
C ii ও iii
D i, ii ও iii
Which endangered species is found in the Sundarbans?
A Irawardi Dolphins
B Royal bengal Tiger
C Pantheratigris
D All of the above
Which group of vertebrates comprises the highest number of endangered species?
A Mammals
B Fishes
C Birds
D Reptiles
Which critically endangered species of Asian rhinoceros is known for its two horns.
A White rhinoceros
B Black rhinoceros
C Sumatran rhinoceros
D Indian rhinoceros
A jar contains only marbles of three colors : red, green and yellow. The red and green marbles are in the ratio of 2 : 5 and the yellow and red marbles are in ratio of 5 : 6. which of the following could be the total number of marbles?
A 52
B 64
C 100
D None of these
When red is X, green is Y, when green is not Y blue is Z. But the is never Z as long as red is red is X. which of the following statements is trued in this context?
A while blue is Z, green is Y
B While red is not X, blue is not Z
C while green in not y, red is not X
D None of the above

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