The marks obtained by 10 students in a class are as follows- what is the probability that the average mark obtained by a student in the class is less than 70 - in decimals begin array - c - c - Whine Student - English - Hindi - Mathematics - Science lithline 1 - 87 - 78 - 90 - 89 Whline2 - 90 - 68 - 76 - 78 Whline3 - 79 - 68 - 59 - 61 Whline4 - 71 - 67 - 79 - 57 whline5 - 69 - 91 - 86 - 76 Nilhline 6 - 87 - 85 - 67 - 60 Whline7 - 78 - 90 - 89 - 93 Whline8 - 92 - 76 - 88 - 90 Whline 9 - 77 - 81 - 85 - 86 Whhine10 - 86 - 75 - 93 - 89 Whlinelendarray

[ Student amp; English amp; Hindi amp; Mathematics amp; Science amp; Average; 1 amp; 87 amp; 78 ...

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard VII

Mathematics

Experimental/ Empirical Probability

The marks obt...

Question

The marks obtained by 10 students in a class are as follows, what is the probability that the average mark obtained by a student in the class is less than 70?(in decimals)

$\begin{matrix} S t u d e n t & E n g l i s h & H i n d i & M a t h e m a t i c s & S c i e n c e 1 & 87 & 78 & 90 & 89 2 & 90 & 68 & 76 & 78 3 & 79 & 68 & 59 & 61 4 & 71 & 67 & 79 & 57 5 & 69 & 91 & 86 & 76 6 & 87 & 85 & 67 & 60 7 & 78 & 90 & 89 & 93 8 & 92 & 76 & 88 & 90 9 & 77 & 81 & 85 & 86 10 & 86 & 75 & 93 & 89 \end{matrix}$

___

Open in App

Solution

$\begin{matrix} S t u d e n t & E n g l i s h & H i n d i & M a t h e m a t i c s & S c i e n c e & A v e r a g e 1 & 87 & 78 & 90 & 89 & 86 2 & 90 & 68 & 76 & 78 & 78 3 & 79 & 68 & 59 & 61 & 66.75 4 & 71 & 67 & 79 & 57 & 68.5 5 & 69 & 91 & 86 & 76 & 80.5 6 & 87 & 85 & 67 & 60 & 74.75 7 & 78 & 90 & 89 & 93 & 87.5 8 & 92 & 76 & 88 & 90 & 86.5 9 & 77 & 81 & 85 & 86 & 82.25 10 & 86 & 75 & 93 & 89 & 85.75 \end{matrix}$

The number of students with average marks less than 70 = 2

Total number of students = 10

The probability of a student securing average mark of less than 70 $= \frac{2}{10} = 0.2$

Suggest Corrections

Similar questions

The marks obtained by 10 students in a class are as follows, what is the probability that the average mark obtained by a student in the class is less than 70?(in decimals)

$\begin{matrix} S t u d e n t & E n g l i s h & H i n d i & M a t h e m a t i c s & S c i e n c e 1 & 87 & 78 & 90 & 89 2 & 90 & 68 & 76 & 78 3 & 79 & 68 & 59 & 61 4 & 71 & 67 & 79 & 57 5 & 69 & 91 & 86 & 76 6 & 87 & 85 & 67 & 60 7 & 78 & 90 & 89 & 93 8 & 92 & 76 & 88 & 90 9 & 77 & 81 & 85 & 86 10 & 86 & 75 & 93 & 89 \end{matrix}$

___

The marks obtained by 10 students in a class are as follows, what is the probability that the average mark obtained by a student in the class is less than 70?(in decimals)

$\begin{matrix} Student & English & Hindi & Mathematics & Science 1 & 87 & 78 & 90 & 89 2 & 90 & 68 & 76 & 78 3 & 79 & 68 & 59 & 61 4 & 71 & 67 & 79 & 57 5 & 69 & 91 & 86 & 76 6 & 87 & 85 & 67 & 60 7 & 78 & 90 & 89 & 93 8 & 92 & 76 & 88 & 90 9 & 77 & 81 & 85 & 86 10 & 86 & 75 & 93 & 89 \end{matrix}$

What is the overall percentage of marks obtained by ‘M’ in all the subjects (rounded off to two digits after decimal)?

Q. The following marks were obtained by the students in a test

81, 72, 90, 90, 86, 85, 92, 70, 71, 83, 89, 95, 85, 79, 62

.
What is the range of the marks obtained?

Q. The following are the marks obtained in Maths by students of Class 8:
51, 94, 34, 20, 50, 81, 81, 90, 76, 34, 51, 86, 93, 99, 26, 54, 85, 71, 88, 40, 44, 56, 55, 57, 78, 53, 81, 78, 65, 78.

Group the data and find out how many students scored between 60 and 70?

Join BYJU'S Learning Program