The safe load, L, of a wooden beam supported at both ends varies jointly as the width, w, the square of the depth, d, and inversely as the length, l. A wooden beam 5in. 5 ⁢ in. wide, 9in. 9 ⁢ in. deep, and 18ft 18 ⁢ ft long holds up 4007lb 4007 ⁢ lb . What load would a beam 8in. 8 ⁢ in. wide, 5in. 5 ⁢ in. deep and 17ft 17 ⁢ ft long of the same material support? (Round off your answer to the nearest pound.)

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

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