The last page number on the textbooks of different subjects in a class is given- begin array - c - c - Shline Subject - Page Number lllhlineHindi - 203 lllhline Maths - 152 lilhlinePhysics - 177 Ilhline Chemistry - 225 lllhline Biology - 172 illhline Computer Sci- - 185 lWhline History - 203 llhline Geography - 172 illhline Moral Sci- - 267 lilline lendarrayFind the probability that the last page number ends ini an odd numberii an even numberiii a multiple of 3- -4 MARKS-

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Standard VII

Mathematics

Chance and Probability

The last page...

Question

The last page number on the textbooks of different subjects in a class is given.

$\begin{matrix} S u b j e c t & P a g e N u m b e r E n g l i s h & 203 H i n d i & 203 M a t h s & 152 P h y s i c s & 177 C h e m i s t r y & 225 B i o l o g y & 172 C o m p u t e r S c i . & 185 H i s t o r y & 203 G e o g r a p h y & 172 M o r a l S c i . & 267 \end{matrix}$

Find the probability that the last page number ends in
(i) an odd number
(ii) an even number
(iii) a multiple of 3. [4 MARKS]

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Solution

Concept: 1 Mark
Solution:1Mark each

Number of books = 10.
Books with last page number ending in odd number = 7.
Required probability = $\frac{7}{10}$ = 0.7.
Books with last page number ending in even number = 3.
Required probability = $\frac{3}{10}$ = 0.3.
Books with last page number ending in a multiple of 3 = 3.
Required probability = $\frac{3}{10}$ = 0.3.

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The last page number on the textbooks of different subjects in a class is given.

$\begin{matrix} Subject & Page Number English & 203 Hindi & 203 Maths & 152 Physics & 177 Chemistry & 225 Biology & 172 Computer Sci. & 185 History & 203 Geography & 172 Moral Sci. & 267 \end{matrix}$

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$\begin{matrix} S u b j e c t & M a r k s E n g l i s h & 77 H i n d i & 90 M a t h s & 70 P h y s i c s & 86 C h e m i s t r y & 85 B i o l o g y & 97 C o m p u t e r S c i . & 59 H i s t o r y & 62 G e o g r a p h y & 100 M o r a l S c i . & 75 \end{matrix}$

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